A perpetual Jewish Calendar

View the Project on GitHub hebcal

What is it?

Hebcal is a perpetual Jewish calendar program, implemented in C. The key routines are translations of Dershowitz & Reingold's lisp code in GNU-Emacs 18. Hebcal offers several convenience routines that make it a good fit for generating calendars for PDAs and personal calendars.

Hebcal has been successfully ported to Perl, C, and Javascript, but I'm currently only maintaining the C implementation.

GitHub now hosts new development

We're using GitHub for further development on hebcal. Go to the hebcal project page to report a bug, get the latest release, or browse the source.


Frequently Asked Questions

Web Sites Offering access to hebcal data

Hebcal is made available for free under the Gnu Public License. However, I would like to hear from you. If you like hebcal, send me a message! If you don't like hebcal, well, let me know also, but be gentle.

If you wish to fund future hebcal development, you can donate here: