• Hebcal Interactive Jewish Calendar - Interactive web interface for generating a list of Jewish dates and times customized to zip codes, converting between Hebrew and Gregorian dates.
• Hebcal Jewish Calendar - Complete Hebrew calendar program for Unix and Windows. Candlelighting times, holidays, Omer counts, and Torah readings. C and Perl source code available, as well as a Windows executable and links to Web versions of the software.
• Hebrew Calendar Science and Myths - A collection of resources concerning the calculation of the Hebrew calendar.
• Hebrew/English Jewish Calendar with Candle Lighting Times - Perpetual calendar for thousands of locations world-wide.
• Jewish Calendar - Interface for finding dates in the Hebrew calendar, with holidays and memorial days. Uses PHP calendar software.
• Jewish Calendar - Hebrew Calendar - Explains the relationship between the Hebrew civil calendar and Hebrew religious calendar and describes the history of the Hebrew month names.
• Jewish Holidays - Dates of all major and minor Jewish holidays and fast days, with explanations, observances, and links to other articles of interest. From the OU.
• Jewish/Civil Calendar Program - Interactive Web program that prints out Jewish and Civil calendars side-by-side. Does not list holidays in either calendar. Source code available.
• Kaluach - Hebrew and english calendar for Windows. Displays a Hebrew or civil month with holidays, Shabbat portions, and halachic times. User data can be added.
• Kaluach.net - Online Hebrew civil calendar portal. Also receive email reminders of holidays and personal events.
• This Month in Jewish History - List of notable events in Jewish history, organized according to Gregorian calendar dates.

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