Why specifically Umm al-Qura?
The Hijri calendar adopted in Saudi Arabia is the Umm al-Qura calendar issued by King Abdulaziz City for Science and Technology. Court judgments, notifications, official gazette issues, and government decisions are all dated by it. The tool uses the same official table embedded in modern browsers, so its result matches the date you see on official documents.
When do you need conversion?
- An official document dated in Hijri, and you want its place in the Gregorian calendar your payroll and contracts run on.
- A court judgment or notification dated in Hijri, and you want to track a statutory period that starts from it — after converting you can use the objection deadline calculator to find the last day.
- A Gregorian contract or obligation, and you want its Hijri equivalent for addressing a government body.
Limits of the tool
The table covers the years 1300 AH to 1600 AH. The official calendar can differ by one day from actual moon sighting on religious occasions — the tool shows the official transactional date, not the sighting announcement. Conversion is general calendar information, not a determination of a statutory deadline in a specific case.