# 🌒 🌓 🌔 esbat 🌖 🌗 🌘

esbat provides functions for lunar phase calculations.

The algorithms are as published in [<i>Calendrical Calculations: The Ultimate Edition</i>][book] by Edward M. Reingold and Nachum Dershowitz, used with permission. The book notes:

> ... the algorithms are centered around the present date, for which they are accurate to within about 2 minutes. Their accuracy decreases for the far-distant past or future.

## License

**This crate uses a non-commercial license**, a [Creative Commons Attribution-NonCommercial 4.0 International License][license], at the request of the authors of <i>Calendrical Calculations</i>. Please contact the author of this crate at [iliana@buttslol.net][mail] for any licensing questions.

[book]: https://doi.org/10.1017/9781107415058
[license]: https://creativecommons.org/licenses/by-nc/4.0/
[mail]: mailto:iliana@buttslol.net