◆ Terms of Service

Last updated: August 2026

Acceptance of Terms

By accessing ZmanimPro (the "Website"), you agree to these Terms of Service. If you do not agree, please do not use the Website.

Free Service

ZmanimPro is a free, non-commercial reference tool. We do not charge any fees, display advertisements, or accept payment for content. The Website is provided as-is for the Jewish community worldwide.

No Warranty

Zmanim (halachic times), Shabbat times, Hebrew calendar dates, Torah portions, Daf Yomi, and all other calculations on this Website are computed algorithmically using the open-source PhpZmanim library and NOAA solar data. While we strive for maximum accuracy, we make no warranty regarding the completeness, reliability, or accuracy of any calculation.

Calculations depend on your exact geographic coordinates and elevation. Small variations may occur due to rounding, opinion differences (Magen Avraham vs. GRA), or local customs.

Not a Substitute for Rabbinic Authority

The times and dates published on this Website are a reference tool only. They are not a substitute for local communal practice or the ruling of a qualified rabbi (posek). For final halachic decisions — especially regarding stringencies (chumrot), cases of doubt, or matters of biblical prohibition — consult a qualified rabbi.

Permitted Use

• You may use the Website for personal, educational, and religious purposes.
• You may link to any page on this Website.
• You may download the .ics calendar file for personal use in your calendar application.

Prohibited Use

• Do not scrape, bulk-download, or redistribute the calculated data without attribution.
• Do not use automated bots that impose excessive server load.
• Do not frame or embed this Website in a way that implies endorsement.
• Do not use the Website for any unlawful purpose.

Open-Source License

The core calculation engine is PhpZmanim (LGPL-2.1), a PHP port of the KosherJava API by Eliyahu Hershfeld. The full license text is included in the vendor/ directory of the source distribution.

Limitation of Liability

To the maximum extent permitted by law, ZmanimPro shall not be liable for any direct, indirect, incidental, or consequential damages arising from the use of, or inability to use, the Website or any calculation provided by it.

Changes to the Website

We may modify, suspend, or discontinue any part of the Website at any time without notice. We are not liable to you for any such change.

Changes to These Terms

We may update these Terms from time to time. Changes will be posted on this page with an updated "Last updated" date. Continued use of the Website after changes constitutes acceptance of the new Terms.

Contact

Questions about these Terms? Email [email protected].