Hijri date converter

Tool notes & guidance

How to use this tool

1. Choose the Gregorian date you want to convert.
2. Select no adjustment initially and convert using the calculated Umm al-Qura calendar.
3. Compare with your local announcement. Use the one-day adjustment only to display that comparison, not to establish a moon sighting.

Gregorian-to-Hijri date conversion

Calendar basis

The converter uses the browser’s Islamic Umm al-Qura calendar. It converts a chosen Gregorian date and allows an optional one-day adjustment for comparison with local announcements.

Example workflow

Choose a Gregorian date, calculate, and check the resulting Hijri date against the calendar used by your local community. If their announced date differs by one day, the adjustment lets you display that comparison.

Observed dates can differ

A calculated calendar does not establish a moon-sighting announcement or the start of a religious observance. Confirm Ramadan, Eid and other observances locally. The homepage clock uses your device timezone.

Example in practice

To compare a community calendar with the calculated date, convert the selected Gregorian date without adjustment first. If the announced Hijri date is one day earlier, select the earlier-date adjustment and convert again. The community announcement remains a separate source.

Common questions

Sources & review status

• Calendar reference

Read the calculation method and limits and editorial standards and review status. These educational tools have not been independently certified by a scholar.