Ramadan Date Calculator — Hijri ⇄ Gregorian
Ramadan Date Calculator
Convert between Hijri and Gregorian dates in both directions.
Based on the tabular Islamic calendar; a local moon sighting can shift the result by one day.
Two-way date conversion
Type a Gregorian date to see the Hijri equivalent, or enter a Hijri day, month and year to see the Gregorian date. Both directions update instantly.
How to use it
- The Gregorian box opens on today.
- The Hijri fields default to 1 Ramadan 1448.
- Change either side; the matching result updates on its own.
Why results can differ by a day
This converter uses the tabular Islamic calendar, an arithmetic model with a fixed 30-year cycle. Real Hijri months begin with the sighting of the crescent, so an official date in your country can be one day before or after the tabular date.
Every calculation on this page runs inside your own browser. Nothing you type is uploaded or stored on our servers.
Why Hijri conversion can differ
This converter uses a tabular arithmetic Islamic calendar for date conversion. Observed or officially declared Hijri dates can differ because many communities determine the start of a lunar month through sighting criteria rather than the arithmetic sequence.
Best use
Use the conversion for planning, archival lookup and approximate correspondence between calendars. For a religious observance tied to a local announcement, use the date declared by the relevant authority.
Arithmetic calendar basis
The tabular calendar follows a calculated lunar-cycle pattern and is useful for conversion. It is not a substitute for an observational Hijri calendar used by a particular country. Historical dates can also differ between published Hijri converters because their underlying calendar models differ.
For official documents
If a legal, academic or archival task requires the date that appeared on an original document, use the document’s stated date and the relevant historical calendar rather than silently replacing it with this converter’s result.
Frequently asked questions
Which Hijri year is 2027?
Most of 2027 falls in 1448 AH, with 1449 AH beginning in mid-December 2027.
Is the tabular calendar reliable for planning?
It is an arithmetic planning conversion and can differ from an observed/official Hijri date. Confirm religious dates with the recognised authority you follow.