Hebrew Calendar

Online Jewish Calendar Conversion Program

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

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

The Online Jewish Calendar Conversion program was designed to convert between the civil calendar (Julian and Gregorian calendar) dates and the Jewish 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 Jewish 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.

To use Online Hebrew Calendar Conversion program please


Jewish Calendar check very unfinished prototype.


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


Alexander Freylicher