Please allow yourself enough time to perform time-bound mitzvot; don't wait until the last minute.
Many observances in Jewish law must be performed at specific times during the day.
The calculation of these halachic times, known as zmanim (Hebrew for times), depends on the various astronomical phenomena of the day for the specific locale.
Explanatory notes on the formulas, algorithms and rules used in calculation and display of the halachic times.
Endorsements for the algorithms used for zmanim (halachic times) used…