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.
References
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: