In Judaism, Rosh Chodesh or Rosh Hodesh is a minor holiday observed at the beginning of every month in the Hebrew calendar, marked by the birth of a new moon. Rosh Chodesh is observed for either one or two days, depending on whether the previous month contained 29 or 30 days.
Rosh Chodesh observance depicted in Juedisches Ceremoniel, a German book published in 1724
The Hebrew calendar, also called the Jewish calendar, is a lunisolar calendar used today for Jewish religious observance and as an official calendar of Israel. It determines the dates of Jewish holidays and other rituals, such as yahrzeits and the schedule of public Torah readings. In Israel, it is used for religious purposes, provides a time frame for agriculture, and is an official calendar for civil holidays alongside the Gregorian calendar.
Jewish calendar, showing Adar II between 1927 and 1948
A shofar made from a ram's horn is traditionally blown in observance of Rosh Hashanah, the beginning of the Jewish civic year.
Calendar for the year 1840/41. Printed by I. Lehrberger u. Comp., Rödelheim. In the collection of the Jewish Museum of Switzerland.
The Trumpeting Place inscription, a stone (2.43×1 m) with Hebrew inscription "To the Trumpeting Place" is believed to be a part of the Second Temple.