Why is this an estimate and not an exact date?

The start of Ramadan is determined by the sighting or announcement of the new moon, which varies by country and weather. This tool uses the tabular Islamic calendar, which can be one to two days different from the announced date.

How accurate is the result?

The tabular Islamic calendar is deterministic and usually within one to two days of the observed start. Different countries may begin Ramadan on slightly different days, so always confirm with a local source.

Is anything I enter sent anywhere?

No. This tool is privacy-first — the calculation runs locally in your browser and nothing leaves your device.

Ramadan Date Estimator

Ramadan date estimator

Enter a Gregorian year to estimate when Ramadan — the 9th month of the Islamic (Hijri) calendar — begins. The tool converts 1 Ramadan for the matching Hijri year to a Gregorian date using the tabular Islamic calendar and shows the weekday too.

This is an estimate: the true start of Ramadan is set by moon sighting and announcements and can differ by a day or two between countries. It is privacy-first — everything runs in your browser and nothing is sent anywhere.