Jewish Calendar / Hebrew Calendar

This is the internet version of my Jewish Calendar / Hebrew Calendar program first developed in 1985 as Microsoft DOS and later as Microsoft Windows application.

Jewish Calendar or, as it is alternatively called, Hebrew Calendar is a traditional lunisolar calendar used by Jewish people throughout the world. The terms Jewish Calendar and Hebrew Calendar will be used as synonyms in this site.

Following is the description of what it does on supported web browsers:

The Online Hebrew Calendar Conversion program was designed to convert between the civil calendar (Julian and Gregorian calendar) dates and the Jewish Calendar / Hebrew Calendar dates. The Online Jewish Calendar Conversion program also gives halachic times for prayer, Shabbat, and the various Jewish holidays and may be adjusted to show times as fixed by the various Rabbinic opinions. It gives the proper halachic times for all major cities in the world. Cities and locations not listed may be added manually.

In addition, the Online Hebrew Calendar Conversion program gives daily information for the weekly Torah portion, weekly Haftorah reading from the Prophets as well as the Daf Yomi - the page of daily Talmud study.

The calendar page displays the Day and Week information:

The Day Information shows the corresponding Hebrew and Gregorian dates, followed by the Julian date and Julian Day (used by astronomers) on the next line. The line that follows is empty, unless it is a Jewish Holiday. In the middle of the line are Chanukah lights or Days of the Omer counted when applicable.

The table of halachic times shows (from left to right):
- Dawn (Morning star / Alot Ha Shachar)
- Time of Tzitzit and Tefillin
- Sunrise
- End of reading Shema (1/4 of a day)
- End of Tefilla (1/3 of a day)
- Midday
- Mincha Gedola, Ketana and Plag Ha Mincha
- Candle lighting time, when applicable
- Sunset
- Dusk (Appearance of 3 stars / Tzet Ha Kochavim)
- Havdalah time and type, when applicable (Basically same as dusk, but excludes lenient opinions to prevent desecration of Shabbat)
- Midnight
- Length of proportional hour (Shaa Zemanit), which is 1/12th of the day

At the end of the day portion you will find the daily reading of Jerusalem and Babylonian Talmud, according to Daf Ha Yomi schedule.

The Week Information starts with the name of the weekly Torah portion or the name of the special Shabbat.
It is followed by the reference (book, chapters and verses) to the public Torah and Prophets reading on Shabbat, according to the major Ashkenazic and Sephardic customs. The weekly chapter of Tractate Avot is shown at the end, when applicable.

To learn more about the theory behind Jewish Calendar / Hebrew Calendar please check unfinished version of Jewish Calendar / Hebrew Calendar Guide .

Enjoy, A. Freylicher