What is Hijri Date Converter?
The Islamic (Hijri) calendar is a lunar calendar consisting of 12 months in a year of approximately 354 or 355 days. It is used to determine the dates of Islamic holidays and events such as Ramadan, Eid al-Fitr, Eid al-Adha, and the Islamic New Year. The calendar begins from the Hijra (migration) of Prophet Muhammad (PBUH) from Makkah to Madinah in 622 CE.
Because the Hijri year is about 11 days shorter than the Gregorian year, Islamic months shift earlier each Gregorian year. This converter helps you translate between the two calendar systems for planning and historical reference.
When to Use This Calculator
- Planning Islamic events — Ramadan, Eid al-Fitr, Eid al-Adha, Islamic New Year, and other celebrations
- Ramadan preparation — determine the start and end dates for fasting and special prayers
- Hajj scheduling — plan your pilgrimage dates with accurate Hijri-to-Gregorian conversion
- Historical research — convert between calendar systems for academic study of Islamic history
- Religious education — teach students about the Islamic calendar and its significance
- Cross-cultural communication — coordinate dates with Muslim communities worldwide
Steps:
- Choose the conversion direction (Gregorian to Hijri or vice versa).
- Enter the year, month, and day.
- Click Convert to see the equivalent date in the other calendar.
- Use the result for planning Islamic events or historical research.
Formula
The conversion uses the Julian Day Number (JDN) as an intermediary:
Gregorian → JDN → Hijri
Hijri → JDN → Gregorian
The Hijri calendar has 30 years in a cycle with 11 leap years.
Months alternate between 29 and 30 days.
Use Cases
- Planning for Ramadan and Eid celebrations
- Converting historical Islamic dates to Gregorian
- Scheduling Islamic events in non-Muslim countries
- Understanding Islamic calendar for religious observances
Key Benefits
- Instant conversion between Gregorian and Hijri dates in both directions
- Essential for determining prayer times, Ramadan dates, and Eid celebrations
- Event planning — schedule Islamic events and holidays with accurate date correspondence
- Historical research — convert between calendar systems for academic and personal study
- Educational reference — learn about the Islamic calendar system and its lunar basis
- Cross-calendar comparison — see how Gregorian and Hijri dates align for any year
Pro Tips
- Crescent sighting varies by location — the same Hijri month may start on different Gregorian dates in different countries
- The Hijri year is approximately 354 days, so Islamic holidays move about 11 days earlier each Gregorian year
- Use the four sacred months (Muharram, Rajab, Dhul-Qadah, Dhul-Hijjah) for planning important Islamic events
- Use this converter for Ramadan start/end dates, then cross-reference with local moon sighting committees for confirmation
- For precise religious dates, always verify with your local mosque or Islamic authority as sighting methods vary
- Remember that the Islamic day begins at sunset (Maghrib), so an evening prayer may fall on the next Hijri day
Common Mistakes to Avoid
- Assuming fixed Gregorian dates for Islamic holidays — they shift approximately 11 days earlier each year
- Ignoring crescent sighting differences between countries — dates may vary by 1-2 days globally
- Confusing lunar (Hijri) and solar (Gregorian) calendar systems — they use fundamentally different bases
- Forgetting the sacred months when planning — Muharram, Rajab, Dhul-Qadah, and Dhul-Hijjah have special significance
- Not checking local moon sighting authority — automated conversions are approximate, not definitive
- Using Hijri dates for financial contracts without understanding the 354-day year and its implications
Key Terms Explained
- Hijri: Islamic lunar calendar
- AH: Anno Hegirae migration year
- Qamari: Lunar months 29-30 days
- Crescent: New moon marks month start
Related Concepts
- Prayer Times: Get accurate salah times for your location based on the solar position.
- Qibla Finder: Find the direction of the Kaaba from your location for prayer.
- Tasbih Counter: Track your dhikr repetitions with a digital Islamic counter.
- Ramadan Countdown: Count down the days until Ramadan begins and ends.
- Zakat Calculator: Calculate your annual zakat obligation on wealth and assets.
Example
January 1, 2025 (Gregorian) = 1 Rajab 1446 AH (Hijri). Ramadan 1, 1446 AH = approximately February 28, 2025. Eid al-Adha 1446 AH = approximately June 7, 2025.
Interpreting Your Results
The converter uses the Julian Day Number (JDN) as an intermediary to translate between Gregorian and Hijri dates. Because the Hijri calendar is purely lunar (not astronomical), dates may vary by 1-2 days depending on local crescent moon sighting. Use this tool for planning and reference, and verify with your local Islamic authority for exact religious dates.