01
Input basis
Subtracts the entered pre-start offset, default 18 minutes, from a Friday sunset time supplied by the user. It does not calculate sunset from location.
Sabbath Time Calculator
Calculate a Sabbath start reference from an entered sunset time and offset.
Sabbath Time Calculator
Exact local times vary by location, custom, and notices. Confirm with local community guidance.
How to use it
02
Custom differences
Candle-lighting, end time, and city standards vary by community and custom. For observance, confirm with a local synagogue or community calendar.
Frequently asked questions
Can I treat this as official?
No. Results are references. Confirm important dates or practices with your community or institution.
Is input sent to the server?
No. This page calculation runs in the browser.