Hijri to Gregorian Date Converter
This Hijri–Gregorian date converter follows the official Umm al-Qura calendar adopted in Saudi Arabia and supports instant conversion in both directions for Hijri years 1300–1500 AH (roughly 1882–2077 CE). Enter a date in either calendar to get its equivalent in the other, with no page reload.
Because a Hijri year is about 11 days shorter than a Gregorian year, there is no simple fixed ratio between the two calendars. The converter therefore relies on the complete official Umm al-Qura month table instead of approximate formulas, which keeps results aligned with official calendars.
Hijri to Gregorian
The Hijri date may differ by one day depending on the moon sighting and the official announcement in your country.
Popular conversions
| Hijri | Gregorian |
|---|---|
| 1 Ramadan 1448 AH | February 8, 2027 — First day of Ramadan |
| 1 Shawwal 1448 AH | March 9, 2027 — Eid al-Fitr |
| 9 Dhul-Hijjah 1448 AH | May 15, 2027 — Day of Arafah |
| 10 Dhul-Hijjah 1448 AH | May 16, 2027 — Eid al-Adha |
| 12 Rabi' al-Awwal 1448 AH | August 25, 2026 — Mawlid an-Nabi |
| 1 Muharram 1449 AH | June 6, 2027 — Islamic New Year |
How does the conversion work? From the official table to the exact day
The conversion here is not an approximate equation but a lookup into the official Umm al-Qura table, which fixes the Gregorian start of every Hijri month from 1300 to 1500 AH. In practice the conversion runs through four steps: (1) the Gregorian date is converted to its Julian Day Number (JDN), the continuous day count underlying astronomical calendars; (2) the table of month starts is searched for the latest Hijri month that began on a JDN not exceeding the requested day; (3) the difference in days yields the day number within that month; (4) the result is displayed in both calendars. Every result is therefore literally identical to the official month table rather than an approximation.
Common traps when converting between the two calendars
First: the months never end together. A Gregorian month has 28–31 days while a Hijri month has 29 or 30, so they never close on the same day; March 31, for example, may correspond to the 29th or 30th of a Hijri month, and anyone assuming the two month-ends align goes wrong by a day or more. Second: the Hijri day starts at sunset. The Hijri date advances by a full day at sunset, before midnight, so any conversion performed “in the evening” must first agree on which Hijri day applies after sunset. Third: the official calendar does not replace the religious announcement. The result here follows Umm al-Qura; countries relying on crescent sighting may declare the month one day earlier or later — use the adjustment switch (one day earlier/later) when matching your country’s announcement.
Frequently asked questions
How do I convert my Gregorian date to Hijri?
Switch the converter to "Gregorian to Hijri" with the swap button, enter the day, month and year, and the equivalent Hijri date appears instantly using the Umm al-Qura calendar.
Why might the result differ by one day from my country’s official calendar?
Some countries do not follow the Umm al-Qura calendar; they rely on local moon sighting or other tabulations, and the start of a month can differ by one day from Umm al-Qura.
What date range does the converter support?
The converter covers Hijri years 1300 to 1500 AH, roughly 1882 to 2077 CE, using the complete official Umm al-Qura table.