Religious Calculators
Prayer times, calendar converters, holiday-date calculators, and other faith-specific tools, organized by tradition. Every calculator here is built on a published formula, calendrical standard, or juridical/canonical convention — see how we verify for the sourcing behind each tradition. Where a calculation has more than one accepted convention within a tradition, the tool discloses which one it defaults to rather than presenting a single answer as the only one.
Prayer times, Hijri calendar, Zakat, halal finance, and other Islamic calculations.
Panchang, Hindu calendar, festival dates, and traditional Vedic astrology tools.
The Hebrew calendar, holiday dates, Shabbat times, and other Jewish life-cycle calculators.
Easter and the movable liturgical calendar, the Julian calendar, and other Christian calculators.
The Badí calendar, Naw-Rúz, Ridván, and other Baháʼí calendar calculators.
The Chinese lunisolar calendar, Chinese festivals, and the Japanese Nengō era system.
The Nanakshahi and Bikrami calendars, Gurpurab dates, and other Sikh calendar calculators.
The Jain calendar, Paryushana/Das Lakshana Parva, and other Jain calendar calculators.
The Buddhist Era calendar, Vesak, Uposatha observance days, and other Buddhist calendar calculators.