Hijri ↔ Gregorian Date Converter
This converter converts between the Islamic (Hijri) lunar calendar and the Gregorian solar calendar using a tabular Hijri calendar algorithm. Commonly used to find dates for Islamic occasions such as Ramadan and Eid al-Adha, and widely referenced in Gulf states. Results may differ by 1–2 days from official moon-sighting calendars.
Note: This converter uses a tabular Hijri calendar. Dates may differ by 1–2 days from local moon-sighting calendars.
ملاحظة: يستخدم هذا المحوّل تقويماً هجرياً حسابياً (Tabular Hijri). قد يختلف التاريخ بيوم أو يومين عن التقويم المعتمد على رؤية الهلال المحلية.
What is the difference between Hijri and Gregorian calendars?
The Hijri calendar is lunar (based on moon cycles) with 354-355 days per year. The Gregorian calendar is solar with 365-366 days. This is why the Hijri year advances about 11 days each Gregorian year.
When did the Hijri calendar begin?
The Hijri calendar began from the Prophet Muhammad's ﷺ migration (Hijra) from Mecca to Medina, corresponding to July 16, 622 CE.
Why might the Hijri date differ by a day?
Official determination in many countries depends on naked-eye moon sighting, which can cause a one-day difference between countries. This tool uses a tabular Hijri calendar algorithm, which may differ by 1–2 days from the observed calendar.
How do I find today's Hijri date?
The tool displays the current Hijri date automatically in the "Today's Hijri Date" panel as soon as you open the page. No input required.
What are the Hijri months in order?
Muharram, Safar, Rabi al-Awwal, Rabi al-Thani, Jumada al-Awwal, Jumada al-Thani, Rajab, Sha'ban, Ramadan, Shawwal, Dhu al-Qi'dah, Dhu al-Hijjah — 12 lunar months in each Hijri year.
How do I accurately convert a Gregorian date to Hijri?
Use the first tab "Gregorian → Hijri" and enter the Gregorian date. The tool uses a tabular Hijri calendar algorithm. Note that the official date in some countries may differ by 1–2 days due to local moon sighting.
What are the sacred (Haram) Hijri months?
The four sacred months are: Dhu al-Qi'dah, Dhu al-Hijjah, Muharram (three consecutive), and Rajab (separate). They were called sacred because fighting was prohibited in them, a prohibition confirmed by Islam.
Does the tool support dates before 1900 CE?
Yes, the Hijri year field supports the range 1300-1600 AH (approximately 1882-2174 CE). For dates outside this range, a specialized source is recommended for precise conversion.
Hijri Calendar — How the Islamic Calendar Works
The Hijri calendar is a lunar calendar with 12 months of 29 or 30 days each, totalling 354-355 days per year — about 11 days shorter than the Gregorian year. This means Islamic dates shift earlier through the Gregorian calendar by approximately 11 days each year. The year 1 Hijri corresponds to the Prophet Muhammad's migration (Hijra) from Mecca to Medina in 622 CE.
The 12 Hijri months
Muharram, Safar, Rabi' al-Awwal, Rabi' al-Thani, Jumada al-Awwal, Jumada al-Thani, Rajab, Sha'ban, Ramadan, Shawwal, Dhu al-Qi'dah, Dhu al-Hijjah. Ramadan (fasting) and Dhu al-Hijjah (Hajj season) are the two most significant religious months.
Tabular vs. observed Hijri dates
Some countries determine the start of Hijri months by physical moon sighting (Oman, Saudi Arabia, UAE), which can vary by one day from calculated dates. This converter uses a tabular Hijri calendar algorithm — a standard mathematical approximation accurate to within 1–2 days of the observed calendar.
Last updated: September 2026