Jewish calendar REST API

Posted by & filed under Developers, APIs, RSS Feeds, Source Code. offers a REST API for fetching Jewish calendar data. The output format is in JSON. The basic URL format is as follows: Note the following customizable parameters and their meanings: v=1 – version. Required. cfg=json – output JSON instead of HTML. Also variant cfg=fc for year=now – “now” for current year, or 4-digit… Read more »

New holidays: Tu B’Av and Sigd

Posted by & filed under News.

At the request of several users, we’ve added support for Tu B’Av and Sigd. Tu B’Av is a minor Jewish holiday of love, similar to Valentine’s Day. It occurs on the 15th of Hebrew month of Av, corresponding to July or August on the Gregorian calendar. This year, Tu B’Av begins on Thursday, 30 July 2015… Read more »


Posted by & filed under General. was primarily authored using hand-coded HTML5, PHP and Perl in Sublime Text 3 and Aquamacs. Our minimalist, responsive design is provided by the Bootstrap framework. The website runs on Apache HTTP Server on Ubuntu Linux. We use the Varnish HTTP accelerator and Pound for HTTPS (TSL/SSL) termination. We primarily use DigitalOcean and Netkine for hosting, with occasional use of Amazon Web Services… Read more »

Pesach on 15th of Nissan vs. the 14th

Posted by & filed under Observance.

Why does Pesach begin on the 15th of Nisan when Numbers 28:16 says “And in the first month, on the fourteenth day of the month, is the LORD’S passover”? Special thanks to Rabbi George Schlesinger for this guest post. First of all, it’s helpful to know and understand the Hebrew and to know that in… Read more »

Chile Daylight Saving Time changes in 2015

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Chile will not change clocks in April 2015 or thereafter; its new standard time will be its old daylight saving time. We have updated Hebcal’s candle-lighting times engine to reflect the change. If you downloaded or printed candle-lighting times for Santiago or any other city in Chile, be sure to re-download sometime before Pesach.