Does it match Umm al-Qura?

Very close, with occasional ±1 day differences due to moon-sighting variations.

Yes — birthdays, holidays, or any event.

Does it work offline?

Yes — entirely local computation.

Pick a direction, then enter the date.

Gregorian date

Result

13 Muharram 1448 AH

We use a well-known algorithm that converts between the two calendars accurately for most dates.

Based on Julian Day numbers shared by both calendar systems.

1 Ramadan 1446 AH ≈ 1 March 2025 CE.

Does it match Umm al-Qura?: Very close, with occasional ±1 day differences due to moon-sighting variations.
Any date?: Yes — birthdays, holidays, or any event.
Does it work offline?: Yes — entirely local computation.