Hijri Calendar Converter

About the Hijri Calendar Converter

The Hijri Calendar Converter is a free online tool that converts dates between the Gregorian (Western) calendar and the Hijri (Islamic) calendar. The conversion is fully bidirectional and accurate, making it easy to find the corresponding Islamic date for any Gregorian date or vice versa. For other date tools, try our Date Calculator and Epoch & Unix Timestamp Converter.

What is the Hijri Calendar?

The Hijri calendar, also known as the Islamic calendar, is a purely lunar calendar consisting of 12 months that follow the phases of the Moon. Each month is 29 or 30 days long, and a Hijri year has approximately 354 days — about 11 days shorter than the Gregorian solar year. The calendar begins its count from the Hijra, the migration of the Prophet Muhammad from Mecca to Medina in 622 CE. Hijri years are marked as AH (Anno Hegirae, Latin for "in the year of the Hijra").

How Does the Conversion Work?

This converter uses the Tabular Islamic Calendar, an arithmetic model widely used by software applications and printed Islamic calendars. In this system, months alternate between 30 and 29 days, and within each 30-year cycle, eleven years are designated as leap years (years 2, 5, 7, 10, 13, 16, 18, 21, 24, 26, and 29). In a leap year, the final month of Dhu al-Hijjah gains a 30th day. The conversion works by converting each calendar date to and from the Julian Day Number (JDN), a continuous day count that both calendars can map to, ensuring exact and reversible conversions.

How to Use the Converter

Using the Hijri Calendar Converter is simple:

• Select a direction: Toggle between Gregorian to Hijri or Hijri to Gregorian conversion.
• Enter the date: For Gregorian to Hijri, pick a date using the date picker. For Hijri to Gregorian, select the Hijri year, month, and day from the dropdowns.
• View the result: The converted date appears instantly on the right side, along with the Arabic month name, date in Arabic-Indic numerals, weekday in Arabic and English, sacred month and leap year indicators, and any Islamic holiday falling on that date.

The Twelve Hijri Months

• Muharram (محرم) — 30 days — A sacred month; Day of Ashura falls on the 10th
• Safar (صفر) — 29 days
• Rabi' al-Awwal (ربيع الأول) — 30 days — Mawlid (Prophet's birthday) on the 12th
• Rabi' al-Thani (ربيع الآخر) — 29 days
• Jumada al-Awwal (جمادى الأولى) — 30 days
• Jumada al-Thani (جمادى الآخرة) — 29 days
• Rajab (رجب) — 30 days — A sacred month; Isra and Mi'raj on the 27th
• Sha'ban (شعبان) — 29 days — Mid-Sha'ban on the 15th
• Ramadan (رمضان) — 30 days — The month of fasting
• Shawwal (شوال) — 29 days — Eid al-Fitr on the 1st
• Dhu al-Qa'dah (ذو القعدة) — 30 days — A sacred month of truce
• Dhu al-Hijjah (ذو الحجة) — 29 days (30 in leap years) — A sacred month; Hajj and Eid al-Adha

Major Islamic Dates

• 1 Muharram — Islamic New Year
• 10 Muharram — Day of Ashura
• 12 Rabi' al-Awwal — Mawlid al-Nabi (Prophet's Birthday)
• 27 Rajab — Isra and Mi'raj
• 15 Sha'ban — Mid-Sha'ban
• 1 Ramadan — First day of fasting
• 27 Ramadan — Laylat al-Qadr (Night of Power)
• 1 Shawwal — Eid al-Fitr
• 9 Dhu al-Hijjah — Day of Arafah
• 10 Dhu al-Hijjah — Eid al-Adha

Why Does the Hijri Year Shift?

Because the Hijri calendar is strictly lunar with about 354 days per year, and the Gregorian calendar is solar with about 365 days, Islamic dates move approximately 11 days earlier each year in the Gregorian calendar. This means that Ramadan, the two Eids, and other Islamic observances cycle through all four seasons over a period of about 33 years.

Accuracy Note

The official beginning of each Islamic month depends on the actual sighting of the new crescent moon, which varies by location and weather conditions. Because of this, the observed date in your country may differ from the calculated tabular date by about one day. This tool is ideal for planning, study, date-of-birth conversion, and historical reference. For religious observance, always follow your local moon-sighting authority.