Need to convert a Gregorian date to the Islamic Hijri calendar — or the other way around? You’re in the right place.
Just pick what you need, enter your date, and we’ll give you the accurate conversion right away.
It’s quick, simple, and built to be super easy for you.
Hijri ↔ Gregorian Date Converter
Note: Dates are approximate and may differ by 1–2 days based on moon sightings and regional variations.
How the Hijri-Gregorian Calendar Conversion Works
Our converter uses standard astronomical calculations to approximate the relationship between Hijri and Gregorian dates.
The Islamic Hijri calendar is based on the phases of the moon, while the Gregorian calendar is based on the Earth’s rotation around the sun.
Because of this difference, there’s no fixed number of days between dates — each conversion is an approximation.
When converting from Gregorian to Hijri, the tool calculates the Julian Day Number (an astronomical count of days) for the entered Gregorian date.
It then adjusts based on the Islamic lunar cycle to find the corresponding Hijri year, month, and day, with a correction to ensure Hijri months do not exceed 30 days.
When converting from Hijri to Gregorian, the tool reverses this process:
it estimates the equivalent Julian Day based on the Hijri date and then finds the corresponding Gregorian date.
Please note: Hijri dates may differ by a day or two depending on local moon sightings, which is why we mention that the results are approximate.
How Reliable and Accurate Is This Hijri Gregorian Date Converter?
This Hijri Gregorian Date Converter is built using standard astronomical calculations to provide highly accurate results for most practical purposes.
It calculates dates based on the average lunar cycle for Hijri months and the established solar cycle for Gregorian dates.
However, it’s important to understand that Hijri dates can vary slightly depending on actual moon sightings, local visibility, and regional announcements.
For example, the beginning of Ramadan, Eid al-Fitr, and Eid al-Adha are traditionally confirmed based on the physical sighting of the moon, which can sometimes cause a difference of one day.
Because of this, while our tool gives a very close estimate, we always recommend verifying important religious dates with your local Islamic authorities when needed.
For everyday use — personal planning, historical references, educational purposes, and general date conversion — this tool offers a reliable and accurate result you can trust.
What Is the Islamic Hijri Calendar?
The Islamic Hijri calendar is the calendar we Muslims use to mark the most sacred events in our lives, from Ramadan and Hajj to Eid al-Fitr and Eid al-Adha.
It is a lunar calendar, based on the phases of the moon, where each month begins with the sighting of the new moon.
The Hijri year is about 10 to 11 days shorter than the solar Gregorian year.
It has 12 months — starting from Muharram and ending with Dhul-Hijjah — and each month has either 29 or 30 days, depending on the moon’s sighting.
The calendar itself began from one of the most important events in Islamic history: the Hijrah — the migration of the Prophet Muhammad ﷺ from Makkah to Madinah.
This event was so significant that Umar ibn al-Khattab رضي الله عنه, during his caliphate, established it as the starting point of our Islamic calendar.
For us as Muslims, the Hijri calendar is not just a way to track time.
It is deeply tied to our acts of worship, our spiritual seasons, and the remembrance of our history.
Our fasting, our Hajj, our Zakat calculations, and many of our duas are linked to Hijri dates.
Living by the Hijri calendar is a way of staying connected to the rhythms Allah ﷻ created, and a way of anchoring ourselves to the legacy of Islam across generations.
What Is the English Gregorian (Shamsi) Calendar?
The Gregorian calendar is the solar (shamsi) calendar that most of the world follows today.
It was introduced in 1582 by Pope Gregory XIII to correct inaccuracies found in the earlier Julian calendar.
The Gregorian calendar is based on the Earth’s movement around the sun and has 12 months and 365 days in a normal year, with a leap year every four years adding an extra day to February.
In this system, months have fixed lengths — some with 30 days, some with 31, and February with 28 or 29 days depending on the year.
Unlike the Islamic Hijri calendar, which is based on the moon, the Gregorian calendar is tightly linked to the solar seasons.
It is used worldwide for business, education, government, and everyday activities.
While Muslims use the Hijri calendar for religious observances, we also use the Gregorian calendar for work, appointments, travel, and many other parts of daily life.
Both calendars play an important role in how we organize our time.