The Buddhist calendar is a set of lunisolar calendars used in mainland Southeast Asian countries of Cambodia, Laos and Thailand as well as in Sri Lanka and Chinese populations of Malaysia and Singapore for religious or official occasions. While the calendars share a common lineage, they have minor but important variations such as intercalation schedules, month names and numbering, use of cycles, etc. In Thailand, the name Buddhist Era is a year numbering system shared by the traditional Thai lunisolar calendar and by the Thai solar calendar; the Southeast Asian lunisolar calendars are based on an older version of the Hindu calendar, which uses the sidereal year as the solar year. One major difference is that the Southeast Asian systems, unlike their Indian cousins, do not use apparent reckoning to stay in sync with the sidereal year. Instead, they employ their versions of the Metonic cycle. However, since the Metonic cycle is not accurate for sidereal years, the Southeast Asian calendar is drifting out of sync with the sidereal one day every 100 years.
Yet no coordinated structural reforms of the lunisolar calendar have been undertaken. Today, the traditional Buddhist lunisolar calendar is used for Theravada Buddhist festivals, no longer has the official calendar status anywhere; the Thai Buddhist Era, a renumbered Gregorian calendar, is the official calendar in Thailand. The calculation methodology of the current versions of Southeast Asian Buddhist calendars is based on that of the Burmese calendar, in use in various Southeast Asian kingdoms down to the 19th century under the names of Chula Sakarat and Jolak Sakaraj; the Burmese calendar in turn was based on the "original" Surya Siddhanta system of ancient India. One key difference with Indian systems is that the Burmese system has followed a variation of the Metonic cycle, it is unclear from where, how the Metonic system was introduced. The Burmese system, indeed the Southeast Asian systems, thus use a "strange" combination of sidereal years from Indian calendar in combination with the Metonic cycle better for tropical years.
In all Theravada traditions, the calendar's epochal year 0 date was the day in which the Buddha attained parinibbāna. However, not all traditions agree on when it took place. In Burmese Buddhist tradition, it was 13 May 544 BCE, but in Thailand, it was 11 March 545 BCE, the date which the current Thai lunisolar and solar calendars use as the epochal date. Yet, the Thai calendars for some reason have fixed the difference between their Buddhist Era numbering and the Christian/Common Era numbering at 543, which points to an epochal year of 544 BCE, not 545 BCE. In Myanmar, the difference between BE and CE can be 543 or 544 for CE dates, 544 or 543 for BCE dates, depending on the month of the Buddhist Era. In Sri Lanka, the difference between BE and CE is 544; the calendar recognizes two types of months: sidereal month. The Synodic months are used to compose the years while the 27 lunar sidereal days, alongside the 12 signs of the zodiac, are used for astrological calculations; the days of the month are counted in two halves and waning.
The 15th of the waxing is the civil full moon day. The civil new moon day is the last day of the month; because of the inaccuracy of the calendrical calculation systems, the mean and real New Moons coincide. The mean New Moon precedes the real New Moon; as the Synodic lunar month is 29.5 days, the calendar uses alternating months of 29 and 30 days. Various regional versions of Chula Sakarat/Burmese calendar existed across various regions of mainland Southeast Asia. Unlike Burmese systems, Lan Na, Lan Xang and Sukhothai systems refer to the months by numbers, not by names; this means reading ancient texts and inscriptions in Thailand requires constant vigilance, not just in making sure one is operating for the correct region, but for variations within regions itself when incursions cause a variation in practice. However, Cambodian month system, which begins with Margasirsa as the first month, demonstrated by the names and numbers; the Buddhist calendar is a lunisolar calendar in which the months are based on lunar months and years are based on solar years.
One of its primary objectives is to synchronize the lunar part with the solar part. The lunar months twelve of them, consist alternately of 29 days and 30 days, such that a normal lunar year will contain 354 days, as opposed to the solar year of ~365.25 days. Therefore, some form of addition to the lunar year is necessary; the overall basis for it is provided by cycles of 57 years. Eleven extra days are inserted in every 57 years, seven extra months of 30 days are inserted in every 19 years; this provides 20819 complete days to both calendars. This 57-year cycle would provide a mean year of about 365.2456 days and a mean month of about 29.530496 days, if not corrected. As such, the calendar adds an intercalary month in leap years and sometimes an intercalary day in great leap years; the intercalary month not only corrects the length of the year but corrects the accumulating error of the month to extent of half a day. The average length of the month is further corrected by adding a day to Nayon
2nd century BC
The 2nd century BC started the first day of 200 BC and ended the last day of 101 BC. It is considered part of the Classical era, although depending on the region being studied, other terms may be more suitable, it considered to be the end of the Axial Age. In the context of the Eastern Mediterranean, it is referred to as the Hellenistic period. Fresh from its victories in the Second Punic War, the Roman Republic continued its expansion into neighboring territories annexing Greece and the North African coast, after destroying the city of Carthage at the end of the Third Punic War. Rome's influence was felt in the Near East, as crumbling Hellenistic states like the Seleucid Empire were forced to make treaties on Roman terms to avoid confrontation with the new masters of the western Mediterranean; the end of the century witnessed the reform of the Roman Army from a citizen army into a voluntary professional force, under the guidance of the noted general and statesman Gaius Marius. In South Asia, the Mauryan Empire in India collapsed when Brihadnatha, the last emperor, was killed by Pushyamitra Shunga, a Mauryan general and the founder of the Shunga Empire.
In East Asia, China reached a high point under the Han Dynasty. The Han Empire extended its boundaries from Korea in the east to Vietnam in the South to the borders of modern-day Kazakhstan in the west. In the 2nd century BC, the Han dispatched the explorer Zhang Qian to explore the lands to the west and to form an alliance with the Yuezhi people in order to combat the nomadic tribe of the Xiongnu. 198 BC: Battle of Panium: Antiochus III of the Seleucid empire defeats Ptolemy V of Egypt and takes control of Coele Syria and Judea. 197 BC: Flamininus defeats Philip V of Macedon at the Battle of Cynoscephalae. 196 BC: Antiochus III conquers western Asia Minor and Thrace, with severe impact on relations with Rome. 196 BC: Empress Lü's execution of Han Xin leads to the Ying Bu rebellion. 195 BC: The War against Nabis marks the end of Spartan power in Greece. 195 BC: Emperor Gaozu of Han dies and is succeeded by his son Hui. True power falls to Empress Lü. 194 BC: Wiman establishes Wiman Joseon in Korea.
192 BC: Antiochus III invades Greece, beginning the Roman-Syrian War. 192 BC: The Yue Kingdom of Eastern Ou established in Zhejiang with Chinese support. 191 BC: Battle of Thermopylae: Glabrio drives Antiochus III out of Greece. 190 BC: Battle of Magnesia: Rome and Pergamon drive Antiochus III out of Asia Minor. 189 BC: Galatian War: Vulso and Pergamon defeat Galatia. 188 BC: Emperor Hui of Han dies. Empress Lü remains in power. 185 BC: Ptolemy V defeats Ankhmakis and regains control of Upper Egypt. C.185 BC: Pushyamitra Shunga assassinates the last Maurya emperor, founding the Shunga dynasty. 183 BC: Zhao Tuo of Nanyue declares himself Emperor and attacks China. 180 BC: Lü Clan Disturbance: with the death of Empress Lü, Emperor Wen of Han is placed on the throne. C.180 BC: Demetrius I of Bactria invades India, leading to the establishment of the Indo-Greek Kingdom. 179 BC: Tiberius Gracchus ends the First Celtiberian War. 179 BC: Zhao Tuo of Nanyue makes peace with China. 176 BC: The Yuezhi attack the Xiongnu.
175 BC: Antiochus IV Epiphanes, took possession of the Syrian throne, at the murder of his brother Seleucus IV Philopator, which rightly belonged to his nephew Demetrius I Soter. 174 BC: The Xiongnu defeat the Yuezhi, who emigrate to Ili valley. 168 BC: Roman victory in the Battle of Pydna leads to the dissolution of the Antigonid Kingdom of Macedon. 168 BC: Antiochus IV of the Seleucid empire invades Egypt, but is forced to turn back by Gaius Popillius Laenas. 167 BC: Mithradates I of Parthia takes Margiana and Aria from the Greco-Bactrian Kingdom. 164 BC, 25 Kislev: Judas Maccabaeus, son of Mattathias of the Hasmonean family, restores the Temple in Jerusalem. 164 BC: Ptolemy VIII drives Ptolemy VI out of Alexandria. He flees to Rome. 164 BC: Antiochus IV dies on campaign, leaving the Seleucid empire to a nine-year-old child. 163 BC: Ptolemy VI regains Alexandria. Ptolemy VIII takes Cyrenaica. 163 BC: The rebel Timarchus seizes Media and Babylonia. 163 BC: On May 20, Chinese mathematicians observed and recorded the passage of the Halley's Comet.
161 BC: Battle of Vijithapura: Dutthagamani defeats the Tamil King Ellalan. 161 BC: Demetrius I Soter seizes the Seleucid throne, beginning a succession war that would consume the Seleucid realm for a century. 160 BC: The Wusun drive the Yuezhi out of the Ili valley. 158 BC: The Xiongnu attack northern China. 157 BC: Emperor Wen of Han dies and is succeeded by his son Jing. 155 BC: The Lusitanians begin the Lusitanian War against Rome. 154 BC: The Celtiberians of Numantia begin the Numantine War against Rome. 154 BC: Liu Pi leads the Rebellion of the Seven States against Emperor Jing of Han China and is defeated. 152 BC: Alexander Balas starts a revolt against Demetrius I Soter with the support of Jonathan Maccabaeus 148 BC: Mithradates I of Parthia takes Ecbatana from the Seleucids. 148 BC: Rome conquers Macedonia. 147 BC: Hasmonean victories restore autonomy to Judea. 146 BC: Rome destroys and razes the city of Carthage and destroys the Achaean League and razes Corinth. 145 BC: Battle of Antioch: Alexander Balas of the Seleucid empire loses his throne and Ptolemy VI of Egypt loses his life.
145 BC: Ptolemy VIII takes control of Alexandria. C. 145 BC: Ai-Khanoum is sacked. 141 BC: Emperor Jing of Han dies and is succeeded by his son Wu whose attempts at reform are stymied by his grandmother. 139 BC: The assassination of Viriathus marks the end of the Lusitanian War. 139 BC: Mithradates I of Parthia defeats the Seleucid king Demetrius II Nicator and captures Babylonia. 138 BC: Minyue's invasion of Eastern Ou sparks off the H
Vikram Samvat. It uses solar sidereal years; the Vikram Samvat is notable because many medieval era inscriptions use it. It is said to be named after the legendary king Vikramaditya, but the term "Vikrama Samvat" does not appear in the historical records before the 9th century, rather the same calendaring system is found by other names such as Krita and Malava. In the colonial era scholarship, the era was believed to be based on the commemoration of King Vikramaditya expelling the Sakas from Ujjain; however epigraphical evidence and scholarship suggest that this theory has no historical basis and likely was an error. Starting in the 9th century and thereafter, epigraphical artwork uses Vikrama-Samvat, suggesting that sometime around the 9th-century, the Hindu calendar era, in use became popular as Vikram Samvat, while Buddhist and Jain epigraphy continued to use an era based on the Buddha or the Mahavira. According to popular tradition, the legendary king Vikramaditya of Ujjain established the Vikrama Samvat era after defeating the Śakas.
Kalakacharya Kathanaka by the Jain sage Mahesarasuri gives the following account: Gandharvasena, the then-powerful king of Ujjain, abducted a nun called Sarasvati, the sister of the monk. The enraged monk sought the help of the Śaka ruler King Sahi in Sistan. Despite heavy odds but aided by miracles, the Śaka king defeated Gandharvasena and made him a captive. Sarasvati was repatriated; the defeated king retired to the forest. His son, being brought up in the forest, had to rule from Pratishthana. On, Vikramaditya invaded Ujjain and drove away from the Śakas. To commemorate this event, he started a new era called the "Vikrama era"; the Ujjain calendar started around 58–56 BCE, the subsequent Shaka era calendar was started in 78 CE at Pratishthana. The association of the era beginning in 57 BCE with Vikramaditya is not found in any source before the 9th century CE; the earlier sources call this era by various names, including Kṛṭa, the era of the Malava tribe, or Samvat. The earliest known inscription that calls the era "Vikrama" is from 842 CE.
This inscription of Chauhana ruler Chandamahasena was found at Dholpur, is dated Vikrama Samvat 898, Vaishakha Shukla 2, Chanda. The earliest known inscription that associates this era with a king called Vikramaditya is dated 971 CE; the earliest literary work that connects the era to Vikramaditya is Subhashita-Ratna-Sandoha by the Jain author Amitagati. For this reason, multiple authors believe that the Vikram Samvat was not started by Vikramaditya, who might be a purely legendary king or the title adopted by a king who renamed the era after himself. V. A. Smith and D. R. Bhandarkar believed that Chandragupta II adopted the title Vikramaditya, changed the name of the era to "Vikrama Samvat". According to Rudolf Hoernlé, the king responsible for this change was Yashodharman: Hoernlé believed that he conquered Kashmir, is the same person as the "Harsha Vikramaditya" mentioned in Kalhana's Rajatarangini. Earlier, some scholars believed that the Vikrama Samavat corresponded to the Azes era of the Indo-Scythian king King Azes.
However, this was disputed by Robert Bracey following the discovery of an inscription of Vijayamitra, dated in two eras. The theory seems to be now discredited by Falk and Bennett, who place the inception of the Azes era in 47–46 BCE; the traditional New Year of Vikram Samvat is one of the many festivals of Nepal, marked by parties, family gatherings, the exchange of good wishes, participation in rituals to ensure good fortune in the coming year. It occurs in mid-April each year, coincides with the traditional new year in Assam, Burma, Kerala, Manipur, Punjab, Sri Lanka, Tamil Nadu and Thailand. In addition to Nepal, the Vikram Samvat calendar is recognized in North and East India, in Gujarat among Hindus. Hindu religious festivals are based on a Luni-Solar calendar, not Solar calendar, based on Vikram Samvat. In North India, the new year in Vikram Samvat starts from the first day of Chaitra Skukla paksha. In Buddhist communities, the month of Baishakh is associated with Buddha's Birthday, it commemorates the birth and passing of Gautama Buddha on the first full moon day in May, except in a leap year when the festival is held in June.
Although this festival is not held on the same day as Pahela Baishakh, the holidays fall in the same month of the Bengali and Theravada Buddhist calendars, are related through the spread of Hinduism and Buddhism in the Indian subcontinent. In Gujarat, the day after Diwali is celebrated as the first day of the Vikram Samvat calendar, the first day of the month Kartik; the Vikrami era is an ancient calendar and has been used by Hindus and Sikhs. It is one of the several regional Hindu calendars that have been in use on the Indian subcontinent, it is based on twelve synodical lunar months and 365 solar days; the lunar new year starts on the new moon in the month of Chaitra. This day, known as Chaitra Sukhladi, is a restricted holiday in India; the Vikrami Samvat has been in use in the Indian subcontinent since ancient times, remains in use by the Hindus in north, w
The Hebrew or Jewish calendar is a lunisolar calendar used today predominantly for Jewish religious observances. It determines the dates for Jewish holidays and the appropriate public reading of Torah portions and daily Psalm readings, among many ceremonial uses. In Israel, it is used for religious purposes, provides a time frame for agriculture and is an official calendar for civil purposes, although the latter usage has been declining in favor of the Gregorian calendar; the present Hebrew calendar is the product including a Babylonian influence. Until the Tannaitic period, the calendar employed a new crescent moon, with an additional month added every two or three years to correct for the difference between twelve lunar months and the solar year; the year in which it was added was based on observation of natural agriculture-related events in ancient Israel. Through the Amoraic period and into the Geonic period, this system was displaced by the mathematical rules used today; the principles and rules were codified by Maimonides in the Mishneh Torah in the 12th century.
Maimonides' work replaced counting "years since the destruction of the Temple" with the modern creation-era Anno Mundi. The Hebrew lunar year is about eleven days shorter than the solar year and uses the 19-year Metonic cycle to bring it into line with the solar year, with the addition of an intercalary month every two or three years, for a total of seven times per 19 years. With this intercalation, the average Hebrew calendar year is longer by about 6 minutes and 40 seconds than the current mean tropical year, so that every 217 years the Hebrew calendar will fall a day behind the current mean tropical year; the era used. As with Anno Domini, the words or abbreviation for Anno Mundi for the era should properly precede the date rather than follow it. AM 5779 began at sunset on 9 September 2018 and will end at sunset on 29 September 2019; the Jewish day is of no fixed length. The Jewish day is modeled on the reference to "...there was evening and there was morning..." in the creation account in the first chapter of Genesis.
Based on the classic rabbinic interpretation of this text, a day in the rabbinic Hebrew calendar runs from sunset to the next sunset. Halachically, a day ends and a new one starts when three stars are visible in the sky; the time between true sunset and the time when the three stars are visible is known as'bein hashmashot', there are differences of opinion as to which day it falls into for some uses. This may be relevant, for example, in determining the date of birth of a child born during that gap. There is no clock in the Jewish scheme. Though the civil clock, including the one in use in Israel, incorporates local adoptions of various conventions such as time zones, standard times and daylight saving, these have no place in the Jewish scheme; the civil clock is used only as a reference point – in expressions such as: "Shabbat starts at...". The steady progression of sunset around the world and seasonal changes results in gradual civil time changes from one day to the next based on observable astronomical phenomena and not on man-made laws and conventions.
In Judaism, an hour is defined as 1/12 of the time from sunrise to sunset, so, during the winter, an hour can be much less than 60 minutes, during the summer, it can be much more than 60 minutes. This proportional hour is known as a sha'ah z'manit. A Jewish hour is divided into parts. A part is 1/18 minute; the ultimate ancestor of the helek was a small Babylonian time period called a barleycorn, itself equal to 1/72 of a Babylonian time degree. These measures are not used for everyday purposes. Instead of the international date line convention, there are varying opinions as to where the day changes. One opinion uses the antimeridian of Jerusalem. Other opinions exist as well; the weekdays proceed to Saturday, Shabbat. Since some calculations use division, a remainder of 0 signifies Saturday. While calculations of days and years are based on fixed hours equal to 1/24 of a day, the beginning of each halachic day is based on the local time of sunset; the end of the Shabbat and other Jewish holidays is based on nightfall which occurs some amount of time 42 to 72 minutes, after sunset.
According to Maimonides, nightfall occurs. By the 17th century, this had become three-second-magnitude stars; the modern definition is when the center of the sun is 7° below the geometric horizon, somewhat than civil twilight at 6°. The beginning of the daytime portion of each day is determined both by sunrise. Most halachic times are based on some combination of these four times and vary from day to day throughout the year and vary depending on location; the daytime hours are divided into Sha'oth Zemaniyoth or "Halachic hours" by taking the time between sunrise and sunset or between dawn and nightfall and dividing it into 12 equal hours. The nighttime hours are s
1st century BC
The 1st century BC known as the last century BC, started on the first day of 100 BC and ended on the last day of 1 BC. The AD/BC notation does not use a year zero; this is the 100th century in the Holocene calendar. 1st century AD follows. In the course of the century all the remaining independent lands surrounding the Mediterranean were brought under Roman control, being ruled either directly under governors or through puppet kings appointed by Rome; the Roman state itself was plunged into civil war several times resulting in the marginalization of its 500-year-old republic, the embodiment of total state power in a single man—the emperor. The internal turbulence that plagued Rome at this time can be seen as the death throes of the Roman Republic, as it gave way to the autocratic ambitions of powerful men like Sulla, Julius Caesar, Mark Antony and Octavian. Octavian's ascension to total power as the emperor Augustus is considered to mark the point in history where the Roman Republic ends and the Roman Empire begins.
Some scholars refer to this event as the Roman Revolution. It is believed that the birth of Jesus, the central figure of Christianity took place at the close of this century. In the eastern mainland, the Han Dynasty began to decline and the court of China was in chaos in the latter half of this century. Trapped in a difficult situation, the Xiongnu had to begin emigration to the west or attach themselves to the Han. 97 BC: Ariarathes VIII is forced out of Cappadocia by Mithridates VI of Pontus, dies soon afterwards. 96 BC: Cyrene is left to the people of Rome by its ruler Ptolemy Apion. 96 BC: King Alexander Jannaeus of Judea wins the Siege of Gaza. 95 BC: Tigranes the Great becomes king of Armenia 93 BC: Ariobarzanes I Philoromaios becomes king of Cappadocia with Roman backing. 91 BC: The assassination of Marcus Livius Drusus leads to the Social War in Italy 91 BC: Crown Prince Ju Revolt in China. 89 BC: Mithridates VI of Pontus's invasion of Cappadocia leads to the First Mithridatic War with the Roman Republic.
89 BC: Valagamba of Anuradhapura gains control of all of Sri Lanka 88 BC: 80,000 Roman civilians killed in the Asiatic Vespers in Asia Minor 87 BC: Emperor Wu of Han dies and is succeeded by his eight-year-old son Zhao, with Jin Midi, Shangguang Jie and Huo Guang as regents. 88-87 BC: Sulla's first civil war - Sulla marches on Rome and defeats Gaius Marius 86 BC: Siege of Athens ends with Roman conquest of Athens. 86 BC: The death of the regent of China Jin Midi unleashes the rivalry of his co-regents Shangguang Jie and Huo Guang. 85 BC: Sulla defeats the forces of Mithridates VI in Greece at the Battle of Orchomenus 85 BC: Aretas III of the Nabataeans conquers Damascus. 83 BC: Sulla makes peace with Mithridates VI and marches on Rome. 83-81 BC: Lucius Licinius Murena wages the Second Mithridatic War. 82 BC: Sertorius flees from Sulla to North Africa via Hispania c.83 BC: Tigranes of Armenia takes control of Syria after the implosion of the Seleucid dynasty. 81 BC: End of Sulla's second civil war - Sulla is appointed dictator of the Roman state, brings about major reforms.
80 BC: Sertorius invades Hispania and sets up his own regime, beginning the Sertorian War. 80 BC: Conflict between the regents Shangguang Jie and Huo Guang results in the destruction of the Shangguang clan and Huo Guang becoming the de facto ruler of China. C.80 BC: Maues, King of the Sakas, conquers Gandhara and Taxila. 77 BC: Fu Jiezi assassinated the king of Loulan on behalf of the Han dynasty. C.75 BC: Kanva dynasty replaces the Shunga dynasty in Magadha. 74 BC: Mithridates VI of Pontus disputes Nicomedes IV of Bithynia's bequest of his kingdom to the Roman Republic, beginning the Third Mithridatic War. 74 BC: Emperor Zhao of Han dies and is succeeded by the unsuitable Prince He of Changyi and by Xuan. Huo Guang continues to be de facto ruler of China. 73 BC: A slave rebellion led by the escaped gladiator Spartacus leads to the Third Servile War. 73-72 BC: Lucullus defeats Mithridates at Tenedos and the Rhyndacus and he flees east to Armenia 71 BC: Pompey the Great ends the Sertorian War and the Third Servile War.
71 BC: Wusun and China attack the Xiongnu. 69 BC: Lucullus invades Armenia and reestablishes the Seleucids in Syria. 68 BC: Pompey replaces Lucullus as leader of the Roman forces in the Third Mithridatic War. 68 BC: Huo Guang dies and Emperor Xuan of Han assumes full power. The Huo clan is eliminated over the following two years. 67 BC: Pompey is given a three-year extraordinary command against the pirates plaguing the Mediterranean and defeats them in forty days. 66 BC: Pompey drives Mithridates VI out of Asia Minor. 66 BC: Aristobulus II seizes power from John Hyrcanus II in Judea. 63 BC: Mithridates VI commits suicide, ending the Third Mithridatic War. 63 BC: Cicero denounces and defeats the Catilinarian Conspiracy. 63 BC: Pompey captures Jerusalem, establishes Roman annexation of Judea as a client kingdom. He permanently abolishes Seleucid Syria. Aristobulus II of Judea removed from John Hyrcanus II restored as Roman vassal. 62 BC: Nabataean kingdom becomes a Roman vassal. 61 BC: Orgetorix and the Helvetii's attempt to migrate into southwestern France leads Julius Caesar to take military action, beginning the Gallic Wars 60 BC: Julius Caesar, Pompey the Great, Marcus Crassus form the First Triumvirate c. 60 BC: The Sakas conquer Mathura.
58 BC: Battle of Bibracte - Julius Caesar conquers the Helvetii 58 BC: Germans invade Gaul and are defeated by Julius Caesar at Battle of Vosges. 58 BC
The Javanese calendar is the calendar of the Javanese people. It is used concurrently with the Gregorian calendar and the Islamic calendar; the Gregorian calendar is the official calendar of the Republic of Indonesia and civil society, while the Islamic calendar is used by Muslims and the Indonesian government for religious worship and deciding relevant Islamic holidays. The Javanese calendar is used by the main ethnicities of Java island—that is, the Javanese and Sundanese people—primarily as a cultural icon and identifier, as a maintained tradition of antiquity; the Javanese calendar is used for cultural and spiritual purposes. The current system of the Javanese calendar was inaugurated by Sultan Agung of Mataram in the Gregorian year 1633 CE. Prior to this, the Javanese had used the Hindu calendar, which begins in 78 CE and uses the solar cycle for calculating time. Sultan Agung's calendar retained the Saka calendar year system of counting, but differs by using the same lunar year measurement system as the Islamic calendar, rather than the solar year.
The Javanese calendar is referred to by its Latin name Anno Javanico or AJ. The Javanese calendar contains multiple, overlapping measurements of times, called "cycles"; these include: the native five-day week, called Pasaran the common Gregorian and Islamic seven-day week the Solar month, called Mangsa the Lunar month, called Wulan the lunar year, or Tahun the octo-ennia cycles, or Windu the 120-year cycle of 15 Windu, called Kurup Days in the Javanese calendar, like the Islamic calendar, begin at sunset. Traditionally, Javanese people do not divide the night into hours, but rather into phases; the division of a day and night are: The native Javanese system groups days into a five-day week called Pasaran, unlike most calendars that uses a seven-day week. The name, pasaran, is derived from the root word pasar, but still today, Javanese villagers gather communally at local markets to meet, engage in commerce, buy and sell farm produce, cooked foods, home industry crafted items and so on. John Crawfurd suggested that the length of the weekly cycle is related to the number of fingers on the hand, that itinerant merchants would rotate their visits to different villages according to a five-day "roster".
The days of the cycle each have two names, as the Javanese language has distinct vocabulary associated with two different registers of politeness: ngoko and krama. The krama names for the days, second in the list, are much less common. ꦊꦒꦶ – ꦩꦤꦶꦱ꧀ ꦥꦲꦶꦁ – ꦥꦲꦶꦠ꧀ ꦥꦺꦴꦤ꧀ – ꦥꦼꦠꦏ꧀ ꦮꦒꦺ – ꦕꦼꦩꦺꦁ ꦏ꧀ꦭꦶꦮꦺꦴꦤ꧀ – ꦲꦱꦶꦃ The origin of the names is unclear, their etymology remains obscure. The names may be derived from indigenous gods, like the European and Asian names for days of the week. An ancient Javanese manuscript illustrates the week with five human figures: a man seizing a suppliant by the hair, a woman holding a horn to receive an offering, a man pointing a drawn sword at another, a woman holding agricultural produce, a man holding a spear leading a bull. Additionally, Javanese consider these days' names to have a mystical relation to colors and cardinal direction: Legi: white and East Pahing: red and South Pon: yellow and West Wage: black and North Kliwon: blurred colors/focus and'center'. Most Markets no longer operate under this traditional Pasaran cycle, instead pragmatically remaining open every day of the Gregorian week.
However many markets in Java still retain traditional names that indicated that once the markets only operated on certain Pasaran days, such as Pasar Legi, or Pasar Kliwon. Some markets in small or medium size locations will be much busier on the Pasaran day than on the other days. On the market's name day itinerate sellers appear selling such things as livestock and other products that are either less purchased or are more expensive; this allows a smaller number of these merchants to service a much larger area much as in bygone days. Javanese astrological belief dictates that an individual’s characteristics and destiny are attributable to the combination of the Pasaran day and the "common" weekday of the Islamic calendar on that person's birthday. Javanese people find great interest in the astrological interpretations of this combination, called the Wetonan cycle; the seven-day-long week cycle is derived from the Islamic calendar, adopted following the spread of Islam throughout the Indonesian archipelago.
The names of the days of the week in Javanese are derived from their Arabic counterparts, namely: These two-week systems occur concurrently. This combination forms the Wetonan cycle; the Wetonan cycle superimposes the five-day Pasaran cycle with the seven-day week cycle. Each Wetonan cycle lasts for 35 days. An example of Wetonan cycle: From the example above, the Weton for Tuesday May 6, 2008 would be read as Selasa Wage; the Wetonan cycle is important for divinatory systems, important celebrations, rites of passage. Commemorations and events are held on days considered to be auspicious. An prominent example, still taught in primary schools, is that the Weton for the Proclamation of Indonesian Independence on 17 August 1945 took place on Jumat Legi. Therefore, Jumat Legi is considered an important night for pilgrimage. There are taboos
The majority of Egyptologists agree on the outline and many details of the chronology of Ancient Egypt. This scholarly consensus is the so-called Conventional Egyptian chronology, which places the beginning of the Old Kingdom in the 27th century BC, the beginning of the Middle Kingdom in the 21st century BC and the beginning of the New Kingdom in the mid-16th century BC. Despite this consensus, disagreements remain within the scholarly community, resulting in variant chronologies diverging by about 300 years for the Early Dynastic Period, up to 30 years in the New Kingdom, a few years in the Late Period. In addition, there are a number of "alternative chronologies" outside scholarly consensus, such as the "New Chronology" proposed in the 1990s, which lowers New Kingdom dates by as much as 350 years, or the "Glasgow Chronology", which lowers New Kingdom dates by as much as 500 years. Scholarly consensus on the general outline of the conventional chronology current in Egyptology has not fluctuated much over the last 100 years.
For the Old Kingdom, consensus fluctuates by as much as a few centuries, but for the Middle and New Kingdoms, it has been stable to within a few decades. This is illustrated by comparing the chronology as given by two Egyptologists, the first writing in 1906, the second in 2000; the disparities between the two sets of dates result from additional discoveries and refined understanding of the still incomplete source evidence. For example, Breasted adds a ruler in the Twentieth dynasty that further research showed did not exist. Following Manetho, Breasted believed all the dynasties were sequential, whereas it is now known that several existed at the same time; these revisions have resulted in a lowering of the conventional chronology by up to 400 years at the beginning of Dynasty I. Forming the backbone of Egyptian chronology are the regnal years as recorded in Ancient Egyptian king lists. Surviving king lists are either comprehensive but have significant gaps in their text, or are textually complete but fail to provide a complete list of rulers for a short period of Egyptian history.
The situation is further complicated by occasional conflicting information on the same regnal period from different versions of the same text. Regnal periods have to be pieced together from inscriptions, which will give a date in the form of the regnal year of the ruling pharaoh, yet this only provides a minimum length of that reign and may or may not include any coregencies with a predecessor or successor. In addition, some Egyptian dynasties overlapped, with different pharaohs ruling in different regions at the same time, rather than serially. Not knowing whether monarchies were simultaneous or sequential results in differing chronological interpretations. Where the total number of regnal years for a given ruler is not known, Egyptologists have identified two indicators to deduce that total number: for the Old Kingdom, the number of cattle censuses. A number of Old Kingdom inscriptions allude to a periodic census of cattle, which experts at first believed took place every second year. However, further research has shown that these censuses were sometimes taken in consecutive years, or after two or more years had passed.
The Sed festival was celebrated on the thirtieth anniversary of a pharaoh's ascension, thus rulers who recorded celebrating one could be assumed to have ruled at least 30 years. However, once again, this may not have been standard practice in all cases. In the early days of Egyptology, the compilation of regnal periods was hampered by a profound biblical bias on the part of Egyptologists; this was most pervasive before the mid 19th century, when Manetho's figures were recognized as conflicting with biblical chronology, based on Old Testament references to Egypt. In the 20th century, such biblical bias has been confined to alternative chronologies outside the scholarly mainstream. A useful way to work around these gaps in knowledge is to find chronological synchronisms, which can lead to a precise date. Over the past decades, a number of these have been found, although they are of varying degrees of usefulness and reliability. Seriation, i.e. archeological sequences. This does not fix a person or event to a specific year, but establishing a sequence of events can provide indirect evidence to provide or support a precise date.
For example, some inscribed stone vessels of the rulers of the first two dynasties were collected and deposited in storage galleries beneath and sealed off when the Step Pyramid of Djoser, a Pharaoh of the Third Dynasty, was built. Another example are blocks from the Old Kingdom bearing the names of several kings, which were reused in the construction of Middle Kingdom pyramid-temples at Lisht in the structures of Amenemhat I; the third pylon at Karnak, built by Amenhotep III contained as "fill" material from the kiosk of Sesostris I, along with various stelae of the Second Intermediate Period and the Eighteenth Dynasty of the New Kingdom. Synchronisms with other chronologies, the most important of these being with the Assyrian and Babylonian chronologies, but synchronisms with the Hittites, ancient Palestine, in the final period with ancient Greece, are used; the earliest such synchronism is in the 18th century