Hijri calendar converter
Convert between the Umm al-Qura Hijri calendar and the Gregorian calendar in either direction. See today’s date in both calendars below. No signup, no tracking until you accept cookies.
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About the Umm al-Qura calendar
The Umm al-Qura calendar is the official Hijri calendar of Saudi Arabia. It is a tabulated lunar calendar — month lengths of 29 or 30 days are computed from astronomical new-moon timing rather than observed sightings, which keeps it consistent across regions. Solarc reads the calendar through your browser’s built-in Intl.DateTimeFormat (islamic-umalqura), so the values match Aladhan, IslamicFinder, and the Saudi government calendar.
Because the Hijri year is about eleven days shorter than the Gregorian year, every Hijri date drifts earlier in the Gregorian year each cycle. After roughly 33 Gregorian years, a date returns to the same season — Ramadan, for example, moves through every Gregorian month over the course of a generation.
Frequently asked questions
What is the Hijri calendar?▼
The Hijri calendar is the lunar calendar used in Islam. Year 1 AH starts on the day of the Prophet Muhammad's migration (hijrah) from Mecca to Medina, corresponding to 16 July 622 CE on the Gregorian calendar. A Hijri year has twelve lunar months totalling about 354 or 355 days, so it drifts roughly eleven days earlier each Gregorian year. After roughly 33 Gregorian years, a Hijri date returns to the same Gregorian season.
What is the Umm al-Qura calendar and why does Solarc use it?▼
Umm al-Qura is the official Hijri calendar published by Saudi Arabia and computed by the King Abdulaziz City for Science and Technology. It is a tabular calendar rather than a strictly observation-based one, which makes it consistent and predictable. It is the calendar used by the Saudi government, by major Hijri-date services like Aladhan and IslamicFinder, and by the Unicode CLDR / ICU implementation that ships in modern browsers. Solarc uses the browser's built-in Intl.DateTimeFormat with the islamic-umalqura calendar, so the answers match what Saudi-aligned communities expect.
Are the twelve Hijri months always the same length?▼
No. Hijri months are either 29 or 30 days. In the Umm al-Qura calendar, the lengths are tabulated for each year so the calendar is predictable. The total for one Hijri year is either 354 days (a common year) or 355 days (a leap year, with Dhu al-Hijjah extended to 30 days). The leap pattern repeats over a 30-year cycle.
Why does the Hijri date sometimes disagree with my local mosque by a day?▼
Many communities still follow lunar observation: the new month begins only when the crescent moon is sighted locally. Because weather, latitude, and visual acuity all matter, observation-based calendars can shift by a day from a tabulated calendar like Umm al-Qura. Solarc shows the Umm al-Qura date because it is unambiguous and matches the Saudi calendar, but your local mosque may use Hilal observation and start a month a day earlier or later.
When is the next Hijri new year?▼
The Hijri new year (1 Muharram) drifts about 11 days earlier each Gregorian year. Convert "1 Muharram" of the year you want using the converter above to see the exact Gregorian date. For example, 1 Muharram 1448 AH lands in late June 2026 CE.
When does Ramadan start this year?▼
Ramadan is the ninth Hijri month. To find the start, set the converter to Hijri → Gregorian, then enter day 1, month 9 (Ramadan), and the Hijri year you want. The Umm al-Qura start may differ from local moon-sighting calendars by a day.
How far in the past or future can I convert?▼
The Umm al-Qura table shipped in modern browsers covers roughly Hijri years 1300 to 1600 (Gregorian years 1882 to 2174). Dates outside that range will return an out-of-range warning. For most practical purposes — Islamic anniversaries, future holidays, family records within a century — the table is more than sufficient.