Open-source licenses
Our yahrzeit calculator runs in your browser and is built on open-source software.
The calculator script (js/yahrzeit.js) combines our own small script with the following libraries. The script as a whole is distributed under the GNU General Public License, version 2 or later, as required by Hebcal. You may copy, modify and redistribute it under those terms.
| Library | Version | License |
|---|---|---|
| @hebcal/core | 6.14.4 | GPL-2.0-or-later |
| @hebcal/hdate | 0.23.1 | GPL-2.0-or-later |
| @hebcal/noaa | bundled dependency | LGPL-2.1 |
| temporal-polyfill, temporal-utils, quick-lru | 1.0.6, 1.0.3, 7.3.0 | MIT |
Source code
The complete corresponding source of the calculator script, with the library packages exactly as bundled, the full license texts, and build instructions: yahrzeit-calculator-source.tar.gz. Upstream source is also at the links above.
The rest of this website (text, design and photos) is a separate work and is not covered by these licenses.