Work out hijri date converter instantly with clear inputs, formula shown and shareable results.
This uses the tabular (Kuwaiti) arithmetic Islamic calendar, converting through the Julian day number with a 30 year cycle of 10,631 days. The tabular calendar is arithmetic rather than observational, so it can differ from a locally announced date by a day or two, which is why the adjustment field exists.
Tabular conversion
convert the Gregorian date to a Julian day number, then apply the 30 year, 10,631 day arithmetic cycle
convert the Gregorian date to a Julian day number, then apply the 30 year, 10,631 day arithmetic cycle. This uses the tabular (Kuwaiti) arithmetic Islamic calendar, converting through the Julian day number with a 30 year cycle of 10,631 days.
The tabular calendar is arithmetic rather than observational, so it can differ from a locally announced date by a day or two, which is why the adjustment field exists.
Enter gregorian date, day adjustment for local sighting. The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.