How does the conversion work?
The tool uses an arithmetic civil Hijri calendar model.
That means it can differ by a few days from officially sighted religious calendars.
Convert dates between Gregorian and Hijri calendars with an arithmetic civil model.
Convert dates between Gregorian and Hijri calendars both ways.
The Hijri conversion uses an arithmetic civil model and can differ from official religious calendars by a few days.
The tool uses an arithmetic civil Hijri calendar model.
That means it can differ by a few days from officially sighted religious calendars.
It is useful for planning, publishing workflows, and approximate date matching across calendars.
For official or religiously sensitive dates, verify against the relevant local authority.