Hijri-Gregorian Date Converter
Enter any Hijri or Gregorian date and get its equivalent instantly with Umm al-Qura precision. The converter displays the result along with the day name and month details.
How Does the Date Converter Work?
The converter bridges two distinct time systems: the lunar cycle of the Hijri calendar (354–355 days per year) and the solar cycle of the Gregorian calendar (365–366 days). Calculations are based on the official Umm al-Qura algorithms and cover the period from 1343 AH (1925 CE) to 1500 AH (2076 CE).
When Do You Need to Convert Dates?
- Documenting contracts and official papers that require both dates
- Matching worship dates and religious occasions with the Gregorian calendar
- Verifying historical dates and academic research
- Converting birth dates and personal events between the two calendars
Why Might the Converted Hijri Date Differ by One Day?
There is a fundamental difference between astronomical (tabular) calculation and actual moon sighting. Our converter relies on the Umm al-Qura calendar, which computes the birth of the crescent astronomically—perfectly accurate for civil and contractual purposes. However, for religious observances (such as the start of Ramadan and Hajj), some Muslim countries require sighting the crescent with the naked eye or a telescope, which may delay the start of the month by one day compared to the astronomical calculation. You can also use the age calculator to find your age in both calendars based on your converted birth date.
Frequently Asked Questions
What is the supported date range for conversion?
The converter covers the period from 1343 AH to 1500 AH, corresponding to 1925 CE to 2076 CE, based on official Umm al-Qura calendar data.
Is the conversion based on the Umm al-Qura calendar?
Yes. All conversions are built on the official algorithms of the Umm al-Qura calendar adopted by Saudi Arabia.
Why might the converted Hijri date differ by a day from my local calendar?
Because some countries rely on visual moon sighting to determine the start of the month, while our converter uses the Umm al-Qura astronomical calculation, which may cause a one-day difference in certain cases.
Can I convert old Gregorian dates to Hijri?
Yes, as long as the date falls within the supported range (from 1925 CE onward). Dates older than that are outside the available Umm al-Qura data.
Can I rely on the converter for official contract documentation?
Yes, the converter is fully based on the Umm al-Qura calendar tables used by Saudi government agencies and widely accepted in official and banking transactions.