DateKeep

About the Hijri Calendar

The Hijri calendar, also known as the Islamic calendar, is a lunar calendar consisting of 12 months in a year of 354 or 355 days. It is used to date events in many Muslim countries and is used by Muslims everywhere to determine the proper days on which to observe the annual fasting of Ramadan, to attend Hajj, and to celebrate other Islamic holidays and festivals.

Tabular vs. Observational

This tool uses a **tabular** Hijri calendar. This is a rule-based variation of the Islamic calendar, in which months are determined by arithmetic rules rather than by observation or astronomical calculation. It provides a predictable calendar that is useful for long-term planning. For religious observances, which often depend on the physical sighting of the new moon, you should always consult with your local mosque or religious authority.

Features

• Predictable Dates: Uses the tabular algorithm for consistent, long-term planning.
• Regional Offset: Adjust the calendar by +/- 2 days to align with local moon-sighting and regional dating conventions.
• Dual Calendar View: Displays both Hijri and Gregorian dates in the same calendar grid.
• Calendar Integration: Export key dates like Ramadan and Eid al-Fitr to your personal calendar.

Related Tools

To see the current phase of the moon, which is the basis for the Islamic calendar, visit our Lunar Calendar. For converting dates to other cultural calendars, see the World Calendar Converter.