Hijri Date Converter

Convert birthdays and document dates between Gregorian and Islamic (Hijri) calendars, both directions, any year. Free, instant, no signup, in your browser.

Free to use. Runs in your browser.

A Hijri date converter changes dates between the Islamic (Hijri) and Gregorian calendars in both directions, for any year. The Hijri calendar is lunar, 354 or 355 days per year, 10 to 11 days shorter than the Gregorian year; year 1 AH corresponds to 622 CE, the year of the Hijrah, the migration of Prophet Muhammad (peace be upon him) to Medina.

This converter uses the Kuwaiti tabular algorithm, which may differ by 1 to 2 days from the Saudi Umm al-Qura calendar and from local moon sighting; for Ramadan and Eid dates, follow your local mosque's announcement.

Gregorian Date

Day

Month

Year

Hijri (Islamic)Enter your date using the input fields

Quick conversion rule

Approximate formulas (for a quick estimate only; use the converter above for exact dates):

Hijri year ≈ (Gregorian year − 622) × 33 ÷ 32
Gregorian year ≈ (Hijri year × 32 ÷ 33) + 622

Worked example, both directions: 27 December 1993 CE = 13 Rajab 1414 AH according to the Kuwaiti tabular algorithm, and 13 Rajab 1414 AH converts back to 27 December 1993 CE.

Which calendar system does this converter use? The Kuwaiti tabular algorithm: a fixed 30 year cycle containing 11 leap years, calculated arithmetically. It is not the Saudi Umm al-Qura calendar and not local moon sighting, so observed dates can differ by 1 to 2 days.

Not a Fatwa, For Educational Purposes Only: This tool provides estimates based on established Islamic jurisprudence (fiqh) and is not a substitute for scholarly guidance. Where schools of thought differ, calculations follow the selected methodology, results may vary between the Hanafi, Maliki, Shafi'i, and Hanbali schools. Consult a qualified Islamic scholar or imam for rulings specific to your circumstances. All calculations are performed in your browser, no personal data is stored or transmitted.

How dates are converted

Formula or method

Conversions use the Kuwaiti algorithm, a tabular Islamic calendar that maps Gregorian and Hijri dates arithmetically in both directions. All computation runs in your browser.

Basis and assumptions

Year 1 AH is fixed to the Hijra of 622 CE; the calendar is lunar, with 12 months of 29 or 30 days totalling about 354 days.
The tabular method gives a fixed arithmetic result, which can differ by a day or two from a date set by local crescent-moon sighting.
The day of the week is taken from the device's Gregorian date functions.

Key handling decisions

The Kuwaiti tabular algorithm is used for both directions; it is close to, but not identical with, the Saudi Umm al-Qura calendar and local moon sighting (ru'yah).
Sacred months and key dates shown below are reference labels, not calculated observances.

What this tool does not decide

The official start of Ramadan, Eid or Hajj, which follow local moon sighting or your national authority's announcement.
Which method (sighting, Umm al-Qura or tabular) your community follows; confirm with your local mosque.

Sources

Kuwaiti algorithm (tabular Islamic calendar)
Hijri era from 622 CE; the four sacred months are noted in the Prophet's (pbuh) farewell sermon

Last checked: 2026-06-11

Understanding the Islamic Calendar

The Hijri calendar is a purely lunar calendar, each month begins with the sighting of a new crescent moon and lasts 29 or 30 days. Unlike the Gregorian (solar) calendar which tracks Earth's orbit around the Sun, the Islamic calendar tracks the Moon's orbit around Earth. This gives it a year of about 354 days, roughly 11 days shorter than a solar year.

That 11-day difference means Islamic dates "move" through the Gregorian calendar. Ramadan, for instance, falls about 11 days earlier each year, cycling through all seasons over approximately 33 years. A Muslim born in 1990 CE has experienced Ramadan in summer, autumn, winter, and spring, with the fasting hours varying dramatically between seasons.

The Twelve Hijri Months

#	Month	Arabic	Significance
1	Muharram	ٱلْمُحَرَّم	Sacred month. Islamic New Year.
2	Safar	صَفَر	Month of travel. Pre-Islamic raids.
3	Rabi al-Awwal	رَبِيع ٱلْأَوَّل	Birth of Prophet Muhammad (pbuh), 12th.
4	Rabi al-Thani	رَبِيع ٱلثَّانِي	Continuation of spring.
5	Jumada al-Ula	جُمَادَىٰ ٱلْأُولَىٰ	Pre-summer month.
6	Jumada al-Thani	جُمَادَىٰ ٱلثَّانِيَة	Continuation of early summer.
7	Rajab	رَجَب	Sacred month. Isra and Mi'raj, 27th.
8	Sha'ban	شَعْبَان	Month of preparation for Ramadan.
9	Ramadan	رَمَضَان	Month of fasting. Quran revealed. Laylat al-Qadr.
10	Shawwal	شَوَّال	Eid al-Fitr on the 1st.
11	Dhul Qi'dah	ذُو ٱلْقَعْدَة	Sacred month. Hajj preparation.
12	Dhul Hijjah	ذُو ٱلْحِجَّة	Sacred month. Hajj (8-13th). Eid al-Adha (10th).

Key Islamic Dates to Remember

1 Muharram

Islamic New Year

The first day of the Hijri calendar.

10 Muharram

Day of Ashura

Voluntary fasting day. Major observance in both Sunni and Shia traditions.

12 Rabi al-Awwal

Mawlid al-Nabi

Birth of Prophet Muhammad (pbuh). Celebrated in many Muslim cultures.

27 Rajab

Isra and Mi'raj

The Night Journey and Ascension of the Prophet (pbuh).

15 Sha'ban

Shab-e-Barat

Night of Forgiveness. Widely observed in South Asian communities.

1 Ramadan

Start of Fasting

Beginning of the month-long fast from dawn to sunset.

27 Ramadan

Laylat al-Qadr

The Night of Power, 'better than a thousand months' (Quran 97:3).

1 Shawwal

Eid al-Fitr

Festival of breaking the fast. Celebrates the end of Ramadan.

8-13 Dhul Hijjah

Hajj

The annual pilgrimage to Makkah, one of the Five Pillars.

10 Dhul Hijjah

Eid al-Adha

Festival of Sacrifice. The most significant Eid in Islam.

How to use this tool

Choose conversion direction: Gregorian to Hijri or vice versa

Enter your date using the input fields

See the converted date with month name and day of week

Common uses

Finding today's Hijri date
Planning for Ramadan, Eid, or Hajj
Converting birthdays or anniversaries
Documenting Islamic dates on legal forms
Checking dates for Islamic events

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Frequently Asked Questions

What is the Hijri calendar?

The Hijri (Islamic) calendar is a lunar calendar of 12 months totalling 354 or 355 days per year. It began with the migration (Hijra) of Prophet Muhammad (peace be upon him) from Makkah to Madinah in 622 CE. It's used by Muslims worldwide to determine religious observances like Ramadan, Hajj, Eid al-Fitr, and Eid al-Adha.

Why is the Islamic year shorter than the Gregorian?

The Islamic calendar follows actual lunar cycles, each month begins with a new moon and lasts 29 or 30 days. Twelve lunar months total about 354 days, roughly 11 days shorter than the 365-day solar (Gregorian) year. This means Islamic dates shift earlier in the Gregorian calendar each year, Ramadan, for example, moves through all four seasons over a 33-year cycle.

What algorithm does this converter use?

This converter uses the Kuwaiti algorithm (also known as the tabular Islamic calendar), a widely accepted arithmetic approximation. It's accurate for most practical purposes but dates may differ by 1-2 days from locally observed moon sighting. For religious observances, always verify with your local Islamic authority.

What are the 12 Hijri months?

The 12 months are: Muharram, Safar, Rabi al-Awwal, Rabi al-Thani, Jumada al-Ula, Jumada al-Thani, Rajab, Sha'ban, Ramadan, Shawwal, Dhul Qi'dah, and Dhul Hijjah. Of these, Ramadan (the fasting month) and Dhul Hijjah (the Hajj month) are the most widely known.

When did the Hijri calendar start?

Year 1 AH (Anno Hegirae) corresponds to 622 CE, the year of the Prophet's migration from Makkah to Madinah. The calendar was formally established during the caliphate of Umar ibn al-Khattab (may Allah be pleased with him), who chose the Hijra as the starting point for the Muslim era.

Why do Islamic dates sometimes differ between countries?

Many Muslim communities determine the start of each month by physical moon sighting (ru'yah) rather than astronomical calculation. Since the new moon may be visible in one location but not another, months can start on different days in different countries. Saudi Arabia, for instance, may announce Eid a day before or after the UK.

What is the current Hijri year?

Most of 2026 CE falls in 1447 AH. The Hijri year advances on 1 Muharram, which the Kuwaiti algorithm used by this tool places at 17 June 2026, so dates from then onwards fall in 1448 AH (Saudi Arabia's Umm al-Qura calendar expects 16 June, and local moon sighting can shift it by a day). Because the Islamic year is about 11 days shorter than the Gregorian year, this changeover arrives roughly 11 days earlier each Gregorian year. For any specific date, use the converter above.

Which months are sacred in Islam?

Four months are considered sacred (haram): Dhul Qi'dah (11th), Dhul Hijjah (12th), Muharram (1st), and Rajab (7th). Fighting was traditionally forbidden during these months. The Prophet (peace be upon him) confirmed their sacred status in his farewell sermon.

What important dates use the Hijri calendar?

Key dates include: 1 Ramadan (start of fasting), 27 Ramadan (Laylat al-Qadr, approximate), 1 Shawwal (Eid al-Fitr), 8-13 Dhul Hijjah (Hajj), 10 Dhul Hijjah (Eid al-Adha), 1 Muharram (Islamic New Year), 10 Muharram (Ashura), and 12 Rabi al-Awwal (Mawlid al-Nabi).

Is the calculation exact?

The tabular algorithm is accurate to within 1-2 days of the actual observed calendar. For religious purposes (starting/ending Ramadan, Eid prayers), always follow your local mosque or Islamic authority's announcement based on moon sighting or the Umm al-Qura calendar.

Results are for general informational purposes only and should be checked before use. They are not professional advice. See our Disclaimer and Terms of Service.