Jewish Calendar

On this page, discover everything you need to know about the Jewish calendar. From the origin of the Hebrew calendar to its modern applications

Hebrew CalendarThe Jewish Calendar, also referred to as the Hebrew Calendar, stands out from the majority of Religious Calendars for being particularly complex, for example, in its calculation of dates. As a Lunisolar Calendar, the Hebrew Calendar uses both the cycle of the Earth around the Sun as well as that of the Moon around the Earth to measure the passing of time.

The current version of the Jewish Calendar is particularly important within the Jewish community as it determines all the Jewish festivals.

Origin of the Jewish Calendar

The Hebrew calendar dates as far back as 3761 BC with the history of the world recorded as seven 1,000 year “days”, corresponding to the seven days of the Earth´s creation. According to the Jewish faith, it is believed that the world will only exist for six thousand years.

 The Lunar Phases in the Jewish Calendar

According to tradition, the first commandment given to the Israelites after their freedom from slavery in ancient Egypt was to sanctify the New Moon. This commandment forced the new nation to abandon the Solar Calendar used by the Egyptians and look to the moon and its Lunar Phases as a way of determining the passing of time and seasons.

Unlike the Solar Calendar, the days according to the Hebrew Calendar begin at sundown and the seasons of the year are marked by special festivals. The Jewish week (shavu´a) begins on a Sunday and the last day of the week, the seventh day, is called the Shabbat:

Sunday Monday Tuesday Wednesday Thursday Friday Saturday
יום ראשון יום שני  יום שלישי  יום רביעי  יום חמישי יום ששי יום שבת
Yom Rishon Yom Sheni Yom Sh´lishi Yom Revi´i Yom Chamishi Yom Shishi Yom Shabbat

However, the current Jewish Calendar is more commonly described as a Lunisolar Calendar. The 354 days that make up a lunar year were adjusted to coincide with the solar year by periodic leap years to ensure that the customary Jewish Festivals would take place in their proper seasons, such as, Passover in Spring.

The Year and Months of the Jewish Calendar

The names of the months in the Jewish Calendar originate from Babylon and the duration of each Hebrew month is determined by the time it takes for the moon to complete a lunar cycle. Although the Hebrew Calendar has been altered throughout the years, the current Jewish Calendar is composed of the following months:

Number Hebrew name Length Babylonian analog Notes
1 Nisan / Nissan 30 days Nisanu called Aviv in the Tanakh
2 Iyar 29 days Ayaru called Ziv in the Tanakh
3 Sivan 30 days Simanu
4 Tammuz 29 days Du'uzu
5 Av 30 days Abu
6 Elul 29 days Ululu
7 Tishrei 30 days Tashritu called Eitanim in the Tanakh
8 Cheshvan 29 or 30 days Arakhsamna also spelled Heshvan; called Bul in the Tanakh
9 Kislev 30 or 29 days Kislimu also spelled Chislev
10 Tevet 29 days Tebetu
11 Shevat 30 days Shabatu
12 Adar I 30 days Adaru Only in leap years
13 Adar / Adar II 29 days Adaru

The years of the Hebrew Calendar are numbered with every seventh year marking a Sabbatical year, called the Sh´mitah. After seven cycles of the Sh´mitah, a Jubilee Year, also known as the Yovel, is to be observed.

Jewish Year Calendar

What year is it according to the Jewish Calendar?

Similar to the majority of calendars which precede the Gregorian Calendar, the dates according to the Jewish Calendar vary from those to which we are accustomed. For example, the year 2014 according to the Gregorian Calendar is the Hebrew year of 5774. To find out what other dates would be in the Hebrew Calendar, try the Jewish Calendar Converter.