Where our Heritage Lives!™

Hebrew Calendar Converter 
Convert to and from the Hebrew, Gregorian and Julian Calendars.

Enter a date in any of the boxes below and press the "Calculate" button to show that date in all of the other calendars.
Please remember that in the Hebrew calendar, any Gregorian date you calculate, after sundown, belongs to the next Jewish day.

Gregorian Calendar


Hebrew Calendar


Hebrew month:


Hebrew dates for the main Jewish holidays

The Hebrew dates for the main Jewish holidays are shown below. The dates are are for the first day of the holiday only, even though the holiday may last for several days. The relevant information is noted below for each holiday.

In the Jewish calendar, the day starts at sundown the evening before. Thus, a holiday whose first day is shown to be Wednesday will actually start on Tuesday evening.

You can enter these dates into the converter above to find the dates of any holiday in any year.

Rosh Hashanah
Yom Kippur
Shemini 'Asereth
Simhath Torah
Tu Bishbat
Lagh La 'Omer
Tish'ah Be'Ab

1 Tashri
10 Tashri
15 Tashri
22 Tashri
23 Tashri
25 Kislew
15 Shebath
14 Adar
15 Nissan
18 Iyyar
6 Siwan
9 Ab









The information is for the diaspora and specifically the United States. In the Land of Israel, some of the information and dates will be different.

For information about the specific holidays please see our Halakha page.


In the diaspora, the observance of the holidays is as follows:

Rosh Hashanah - 2 days of Yom Tob
Yom Kippur - 1 day Yom Tob
Sukkoth - 2 days of Yom Tob at the beginning followed by 5 days of Hol Hammo'ed.
Shemini 'Asereth - 1 day of Yom Tob
Simhath Torah - 1 day of Yom Tob
Hanukkah - 8 days
Tu Bishbat - 1 day
Purim - 1 day preceded by a fast day
Pesah - 2 days of Yom Tob followed by 4 days of Hol Hammo'ed and 2 final days of Yom Tob.
Lagh La 'Omer - 1 day
Shabuoth - 2 days of Yom Tob
Tish'ah Be'Ab - 1 day








The Julian Calendar

You can also convert to and from the Julian, Gregorian and Hebrew Calendars. 

Julian Day

Julian day:  






Modified Julian Day 

Mod. Julian day:  




Julian Calendar








The following are for programmers
(The basic rule that if you don't know what it is you don't need it - applies.)

ISO-8601 Week and Day, and Day of Year

Day of week of year





Day of year




Unix time() value

Unix time() value:  




Excel Serial Day Number

1900 Date System (PC)
Excel serial day:






1904 Date System (Macintosh)
Excel serial day:







©  Copyright Midrash BEN ISH HAI. All Rights Reserved Worldwide.