May is a month of spring in the Northern Hemisphere and autumn in the Southern Hemisphere. Therefore, May in the Southern Hemisphere is the seasonal equivalent of November in the Northern Hemisphere and vice versa. Late May typically marks the start of the summer vacation season in the United States and Canada and ends on Labor Day, first Monday of September.
- 1 Background
- 2 May symbols
- 3 May observances
- 3.1 Month-long observances
- 3.2 Non-Gregorian observances, 2018
- 3.3 Movable observances, 2018
- 3.3.1 Last Friday in April to the first Sunday in May: April 27 – May 6
- 3.3.2 First Tuesday: May 1
- 3.3.3 First Thursday: May 3
- 3.3.4 First Saturday: May 5
- 3.3.5 First full week: May 6-12
- 3.3.6 Week of May 12: May 6-12
- 3.3.7 Saturday closest to May 10:
- 3.3.8 Second Saturday:
- 3.3.9 Second Weekend:
- 3.3.10 Second Sunday:
- 3.3.11 Third Monday:
- 3.3.12 Third Friday:
- 3.3.13 Third Saturday:
- 3.3.14 Third Sunday:
- 3.3.15 Monday on or before May 24:
- 3.3.16 Monday on or before May 25:
- 3.3.17 Last Monday preceding May 25:
- 3.3.18 May 24, or the nearest weekday if May 24 falls on a weekend:
- 3.3.19 Last Thursday:
- 3.3.20 Last Sunday:
- 3.3.21 Last Weekend:
- 3.3.22 Last Monday:
- 3.3.23 Last Wednesday:
- 3.3.24 Movable Western Christian observances, 2018 dates
- 3.3.25 Movable Eastern Christian observances, 2018 dates
- 3.4 Fixed observances in May
- 4 See also
- 5 References
The month May was named for the Greek Goddess Maia, who was identified with the Roman era goddess of fertility, Bona Dea, whose festival was held in May. Conversely, the Roman poet Ovid provides a second etymology, in which he says that the month of May is named for the maiores, Latin for "elders," and that the following month (June) is named for the iuniores, or "young people" (Fasti VI.88).
Mayovka, in the context of the late Russian Empire, was a picnic in the countryside or in a park in the early days of May, hence the name. Eventually, "mayovka" (specifically, "proletarian mayovka") came to mean an illegal celebration of May 1 by revolutionary public, typically presented as an innocent picnic.
Eta Aquariids meteor shower appears in May. It is visible from about April 21 to about May 20 each year with peak activity on or around May 6, the Arietids shower from May 22 – July 2, and peaks on June 7. The Virginids also shower at various dates in May.
Ancient Roman observances
Under the calendar of ancient Rome, the festival of Bona Dea fell on May 1, Argei fell on May 14 or May 15, Agonalia fell on May 21, and Ambarvalia on May 29. Floralia was held April 27 during the Republican era, or April 28 on the Julian calendar, and lasted until May 3. Lemuria (festival) fell on 9,11, and 13 May under the Julian calendar. The College of Aesculapius and Hygia celebrated two festivals of Rosalia (festival), one on May 11 and one on May 22. Rosalia was also celebrated at Pergamon on May 24–26. A military Rosalia festival, Rosaliae signorum, also occurred on May 31. Ludi Fabarici was celebrated on May 29 – June 1. Mercury would receive a sacrifice on the Ides of May (May 15). Tubilustrium took place on May 23 as well as in March. These dates do not correspond to the modern Gregorian calendar.
- May's birthstone is the emerald which is emblematic of love and success.
- The May birth flower is the Lily of the Valley and the Crataegus monogyna. It is native throughout the cool temperate Northern Hemisphere in Asia, Europe, and in the southern Appalachian Mountains in the United States, but has been naturalized throughout the temperate climactic world.
- The "mayflower" Epigaea repens is a North American harbinger of May, and the floral emblem of both Nova Scotia and Massachusetts. Its native range extends from Newfoundland south to Florida, west to Kentucky in the southern range, and to Northwest Territories in the north.
- The zodiac signs for the month of May are Taurus (until May 20) and Gemini (May 21 onwards).
- In Catholic tradition, May is the Month of the Blessed Virgin Mary. See May devotions to the Blessed Virgin Mary
- Celiac Awareness Month
- Cystic Fibrosis Awareness Month.
- Ehlers-Danlos Syndrome Awareness month
- International Mediterranean Diet Month
- National Mobility Awareness Month (United States, Canada)
- Season of Emancipation (April 14 to August 23) (Barbados)
- Better Hearing and Speech Month
- Kaamatan harvest festival (Labuan, Sabah)
- National Electrical Safety Month (United States)
- Flores de Mayo (Philippines)
- Garden for Wildlife month
- New Zealand Music Month (New Zealand)
- National Pet Month (United Kingdom)
- Skin Cancer Awareness Month
- National Smile Month (United Kingdom)
- South Asian Heritage Month (International)
- World Trade Month
- Asian Pacific American Heritage Month
- National ALS Awareness Month
- National Innovators Month
- National Brain Tumor Awareness Month 
- National Burger Month 
- Community Action Awareness Month (North Dakota, United States)
- National Foster Care Month (United States)
- National Golf Month 
- Jewish American Heritage Month
- Haitian Heritage Month
- Hepatitis Awareness Month
- Mental Health Awareness Month
- National Military Appreciation Month
- National Moving Month 
- Older Americans Month 
- National Osteoporosis Month 
- National Stroke Awareness Month
- National Water Safety Month 
- National Corps Member Appreciation Month
Non-Gregorian observances, 2018
(Please note that all Baha'i, Islamic, and Jewish observances begin at the sundown prior to the date listed, and end at sundown of the date in question unless otherwise noted.)
Movable observances, 2018
- Phi Ta Khon (Dan Sai, Loei province, Isan, Thailand) Dates are selected by village mediums and can take place anywhere between March and July.
- National Stuttering Awareness Week (United States): May 7-13
- National Small Business Week (United States)
- National Hurricane Preparedness Week (United States)
- Green Office Week (Britain)
- New Zealand Sign Language Week
- Occupational Safety and Health Professional Day
- Bike Week (Bicycle Week) (United States
- Walk Safely to School Day
- Emergency Medical Services Week (United States)
- Bike to Work Week Victoria
Last Friday in April to the first Sunday in May: April 27 – May 6
First Tuesday: May 1
First Thursday: May 3
- Arbor Day (Nova Scotia, Canada)
- National Day of Prayer (United States)
- National Day of Reason (United States)
Friday preceding Second Sunday in May: May 4
First Saturday: May 5
First full week: May 6-12
- National Teacher Appreciation Week (United States)
- North American Occupational Safety and Health Week (United States)
- National Nursing Week (United States)
First Sunday: May 6
- Mother's Day (Angola, Cape Verde, Hungary, Lithuania, Mozambique, Portugal, Romania, Spain)
- World Laughter Day
Tuesday of First full week: May 8
Saturday closest to May 10:
- International Migratory Bird Day (Canada, the United States, Mexico, Central and South America, and the Caribbean)
- National Tree Planting Day (Mongolia)
- National Nursing Home Week (United States)
- Children's Day (Spain)
- Father's Day (Romania)
- Mother's Day (Anguilla, Aruba, Australia, Austria, Bahamas, Barbados, Bangladesh, Belgium, Belize, Bermuda, Bonaire, Brazil, Brunei, Canada, Chile, Colombia, Cuba, Croatia, Curaçao, Czech Republic, Denmark, Ecuador, Estonia, Finland, Germany, Greece, Grenada, Honduras, Hong Kong, Iceland, India, Italy, Jamaica, Japan, Latvia, Malta, Malaysia, the Netherlands, New Zealand, Pakistan, Peru, Philippines, Puerto Rico, Singapore, Slovakia, South Africa, Suriname, Switzerland, Taiwan, Trinidad and Tobago, Turkey, United States, Uruguay, Venezuela, Zimbabwe)
- State Flag and State Emblem Day (Belarus)
- World Fair Trade Day
- Arbor Day (Prince Edward Island, Canada)
- National Defense Transportation Day
- National Defense Transportation Week is the week in which National Transportation Day falls.
- Endangered Species Day (United States)
- National Pizza Party Day (United States)
- The Preakness Stakes is run, second jewel in the triple crown of horse racing.
- Culture Freedom Day
- Armed Forces Day (United States)
- World Whisky Day
- Sanja Matsuri
- Commemoration Day of Fallen Soldiers
- Father's Day (Tonga)
- Feast of Our Lady of the Audience
- Sanja Matsuri (Tokyo, Japan)
Monday on or before May 24:
Monday on or before May 25:
Last Monday preceding May 25:
May 24, or the nearest weekday if May 24 falls on a weekend:
- Bermuda Day (Bermuda)
- Take a Girl Child to Work Day (South Africa)
Saturday closest to May 30:
- Armed Forces Day (Spain)
- Arbor Day (Venezuela)
- Children's Day (Hungary)
- Mother's Day (Algeria, Dominican Republic, Haiti, Mauritius, Morocco, Sweden, Tunisia)
- Turkmen Carpet Day (Turkmenistan)
- Heroes' Day (Turks and Caicos Islands)
- Memorial Day (United States), a public holiday, is on May 30, but observed on the last Monday in May.
- Ratu Sir Lala Sukuna Day (Fiji), removed as a national holiday in 2010.
Movable Western Christian observances, 2018 dates
- Rogation Sunday – May 6
- Earth Day Sunday: May 6 (some Protestant denominations) (Sunday before Earth Day)
- Minor Rogation days – May 7–9
- Feast of the Ascension – May 10
- Pentecost begins: May 20
- Whitsun: May 20
- Whit Monday: May 21
- Whit Tuesday: May 22
- Feast of Christ the Priest: May 24 (first Thursday after start of Pentecost)
- Whit Friday: May 25 (North West England)
- Trinity Sunday: May 27
- Corpus Christi (feast): May 31
Movable Eastern Christian observances, 2018 dates
- Mid-Pentecost: May 2 (Wednesday after the Sunday of the Paralytic)
- Sunday of the Samaritan Woman – May 6 (5th Sunday of Pascha)
- Sunday of the Blind Man – May 13 (6th Sunday of Pascha)
- Feast of the Ascension – May 17 (forty days after Pascha)
- Sunday of the Holy Fathers: May 20 (7th Sunday of Pascha)
- Saturday of the Dead: May 26 (7th Saturday of Pascha)
- Pentecost: May 27 (Fifty days after Pascha)
- Day of the Holy Spirit: May 28
- Third Day of the Trinity: May 29
Fixed observances in May
- April 29 to May 5 in Japan, which includes four different holidays, is called "Golden Week". Many workers have up to 10 days off. There is also 'May sickness', where new students or workers start to be tired of their new routine. (In Japan the school year and fiscal year start on April 1.)
- May 1
- May 2
- May 3
- May 4
- Anti-Bullying Day (United Nations)
- Bird Day (United States)
- Cassinga Day (Namibia)
- Death of Milan Rastislav Štefánik Day (Slovakia)
- Greenery Day (Japan)
- International Firefighters' Day
- May Fourth Movement commemorations:
- Remembrance Day for Martyrs and Disabled (Afghanistan)
- Remembrance of the Dead (Netherlands)
- Restoration of Independence day (Latvia)
- Star Wars Day (International observance)
- World Give Day
- Youth Day (Fiji)
- May 5
- Children's Day (Japan, Korea)
- Cinco de Mayo
- Constitution Day (Kyrgyzstan)
- Coronation Day (Thailand)
- Europe Day in Europe (uncommon usage, largely replaced by May 9).
- Feast of al-Khadr or Saint George (Palestinian)
- Indian Arrival Day (Guyana)
- International Midwives' Day
- Liberation Day (Denmark)
- Liberation Day (Netherlands)
- Lusophone Culture Day (Community of Portuguese Language Countries)
- Martyrs' Day (Albania)
- Patriots' Victory Day (Ethiopia)
- Senior Citizens Day (Palau)
- Tango no sekku (Japan)
- May 6
- Martyrs' Day (Gabon)
- Martyrs' Day (Lebanon and Syria)
- International No Diet Day
- Teachers' Day (Jamaica)
- The first day of Hıdırellez (Turkey)
- St George's Day related observances (Eastern Orthodox Church):
- May 7
- May 8
- Miguel Hidalgo's birthday (Mexico)
- Parents' Day (South Korea)
- Time of Remembrance and Reconciliation for Those Who Lost Their Lives during the Second World War, continues to May 9
- Truman Day (Missouri, United States)
- White Lotus Day (Theosophy)
- World Red Cross and Red Crescent Day
- Veterans Day (Norway)
- VE Day in Western Europe. In Eastern Europe it is celebrated on May 9.
- May 9
- Anniversary of Dianetics (Church of Scientology)
- Europe Day (European Union)
- Liberation Day (Guernsey), commemorating the end of the German occupation of the Channel Islands during World War II.
- Liberation Day (Jersey), commemorating the end of the German occupation of the Channel Islands during World War II.
- Time of Remembrance and Reconciliation for Those Who Lost Their Lives during the Second World War, continued from May 8.
- Victory Day observances, celebration of the Soviet Union victory over Nazi Germany (Soviet Union, Azerbaijan, Belarus, Bosnia and Herzegovina, Georgia, Israel, Kazakhstan, Kyrgyzstan, Moldova, Russia, Serbia, Tajikistan, Turkmenistan, Uzbekistan)
- Victory Day over Nazism in World War II (Ukraine)
- Victory and Peace Day (Armenia) marks both the capture of Shusha (1992) in the Nagorno-Karabakh War, and the end of World War II.
- May 10
- Children's Day (Maldives)
- Confederate Memorial Day (North Carolina and South Carolina)
- Constitution Day (Federated States of Micronesia)
- Golden Spike Day (1869 – Completion of the First Transcontinental Railroad – Promontory Summit, Utah)
- Independence Day (Romania), celebrating the declaration of independence of Romania from the Ottoman Empire in 1877.
- Liberation Day (Sark), commemorating the end of the German occupation of the Channel Islands during World War II.
- May 11
- May 12
- May 13
- May 14
- May 15
- Beginning of Tourette Syndrome awareness month. It ends on June 15
- Argei (Ancient Rome)
- Army Day (Slovenia)
- Constituent Assembly Day (Lithuania)
- Independence Day (Paraguay)
- International Day of Families
- Mercuralia (Ancient Rome)
- Nakba Day (Palestinian communities)
- Peace Officers Memorial Day (United States)
- Republic Day (Lithuania)
- Saint Ubaldo Day
- Teachers' Day (Colombia, Mexico, South Korea)
- May 16
- May 17
- National Day Against Homophobia (Canada)
- International Day Against Homophobia and Transphobia aka IDAHO
- Birthday of the Raja (Perlis)
- Children's Day (Norway)
- Constitution Day (Nauru)
- Galician Literature Day (Galicia (Spain))
- World Hypertension Day
- World Information Society Day
- Liberation Day (Democratic Republic of the Congo)
- Navy Day (Argentina)
- Norwegian Constitution Day
- May 18
- Baltic Fleet Day (Russia)
- Battle of Las Piedras Day (Uruguay)
- Day of Remembrance of Crimean Tatar genocide (Ukraine)
- Flag and Universities Day (Haiti)
- Independence Day (Somaliland) (unrecognized)
- International Museum Day
- Mullivaikkal Remembrance Day (Sri Lankan Tamils)
- Revival, Unity, and Poetry of Magtymguly Day (Turkmenistan)
- Teacher's Day (Syria)
- Victory Day (Sri Lanka)
- World AIDS Vaccine Day
- May 19
- May 20
- May 21
- Afro-Colombian Day (Colombia)
- Agonalia (Roman Empire)
- Circassian Day of Mourning (Circassians)
- Day of Patriots and Military (Hungary)
- Navy Day (Chile)
- Saint Helena Day, celebrates the discovery of Saint Helena in 1502.
- World Day for Cultural Diversity for Dialogue and Development (International)
- One of the three festivals of Vejovis (Roman Empire)
- May 22
- Abolition Day (Martinique)
- Harvey Milk Day (California)
- International Day for Biological Diversity (International)
- National Maritime Day (United States)
- National Sovereignty Day (Haiti)
- Republic Day (Sri Lanka)
- Translation of the Relics of Saint Nicholas from Myra to Bari (Ukraine)
- Unity Day (Yemen)
- World Goth Day
- May 23
- May 24
- Feast of Mary Help of Christians (Roman Catholicism)
- Aldersgate Day/Wesley Day (Methodism)
- Battle of Pichincha Day (Ecuador)
- Commonwealth Day (Belize)
- Independence Day (Eritrea)
- Lubiri Memorial Day (Buganda)
- Rosalia, May 24–26. (Pergamon, Roman Empire)
- Saints Cyril and Methodius Day (Eastern Orthodox Church) and its related observance:
- Bulgarian Education and Culture and Slavonic Literature Day (Bulgaria)
- Saints Cyril and Methodius, Slavonic Enlighteners' Day (Republic of Macedonia)
- May 25
- Africa Day (African Union)
- African Liberation Day (African Union)
- Day of Youth
- Geek Pride Day
- Independence Day (Jordan)
- Liberation Day (Lebanon)
- May Revolution (or Revolución de Mayo), a national holiday in Argentina
- International Missing Children's Day
- Last bell (Russia, post-Soviet countries)
- Liberation Day (Lebanon)
- National Day (Argentina)
- National Missing Children's Day (United States)
- National Tap Dance Day (United States)
- Towel Day
- May 26
- May 27
- May 28
- May 29
- May 30
- May 31
|Wikiquote has quotations related to: May|
|Wikimedia Commons has media related to May.|
|Look up May in Wiktionary, the free dictionary.|
- "Маевки". homofestivus.ru.
- "U101 College Search". shgresources.com. Archived from the original on 2012-09-11.
- "Raise CF Awareness". cff.org.
- "What Can I Do for May Ehlers-Danlos Syndrome Awareness Month?". www.lifewitheds.com.
- "International Mediterranean Diet Month". oldwayspt.org.
- "May is Better Hearing & Speech Month". asha.org.
- "Electrical Safety Foundation International". esfi.org.
- "May is Garden for Wildlife Month". nwf.org.
- Cactuslab. "NZ Music Month 2015 — Official Site". nzmusicmonth.co.nz.
- "National Pet Month – promoting responsible pet ownership across the UK". nationalpetmonth.org.uk.
- "Skin Cancer Awareness Month Reminder". skincancer.org.
- "World Trade Month".
- Frank Ranieri. "Miles for Hope is now Brain Tumor Alliance". milesforhope.org. Archived from the original on 2013-04-15.
- "Archived copy". Archived from the original on 2014-05-17. Retrieved 2014-05-28.
- "Community Action Awareness Month". nd.gov. Archived from the original on 2015-05-18.
- "National Foster Care Month 2015: Building Blocks Toward Permanent Families". childwelfare.gov.
- "National Golf Month at Mipins". nationalgolfmonth.com.
- "May is Hepatitis Awareness Month". cdc.gov.
- "NATIONAL MILITARY APPRECIATION MONTH 2005". nmam.org.
- McGuire, Holly; Keil, Kathryn (2010). Chase's 2010 Calendar of Events. McGraw-Hill Companies, Inc.
- GovTrack.us: Tracking the U.S. Congress[dead link]
- "National Osteoporosis Foundation". nof.org.
- "Stroke Awareness Resource Center". Stroke.org.
- "National Water Safety Month". nationalwatersafetymonth.org.
- U.S. Fish and Wildlife Service. "U.S. Fish and Wildlife Service – Endangered Species Day". fws.gov.
- "NATIONAL PIZZA PARTY DAY – Third Friday in May". National Day Calendar.
- "Ceremony at "Wedding of the Rails," May 10, 1869 at Promontory Point, Utah". World Digital Library. 1869-05-10. Retrieved 2013-07-20.