Convert dates between Gregorian and Hijri (Islamic) calendars

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About Calendar Conversion

Convert dates between the Gregorian (Western) calendar and the Hijri (Islamic) calendar. The Hijri calendar is a lunar calendar used to determine Islamic holidays and events.

Key Differences

  • Gregorian: Solar calendar with 365/366 days per year
  • Hijri: Lunar calendar with 354/355 days per year
  • Hijri year is approximately 11 days shorter than Gregorian year
  • Islamic dates shift earlier each Gregorian year

📅 Calendar Converter — Free Online Tool

Convert dates between Gregorian and Hijri calendars, free. A calendar converter translates a date between the Gregorian (civil) calendar and the Hijri (Islamic lunar) calendar in both directions. It's used to find the Islamic date for a Gregorian day — or vice versa — for holidays, records, and planning, and it runs entirely in your browser.

🚀 Why use this Calendar Converter tool?

It converts both ways between Gregorian and Hijri dates, so you can look up an Islamic date for any civil day or place a Hijri date on the civil calendar. 100% free, no registration, and complete privacy — everything runs locally in your browser, so your data never touches a server.

Key Features

🔁Bidirectional

Convert Gregorian → Hijri or Hijri → Gregorian with one tool.

🌙Lunar-aware

Handles the Hijri lunar calendar's month lengths so dates map correctly.

Instant

Enter a date and read the converted date immediately, no lookup tables.

🔒100% private

Conversion runs locally; nothing is uploaded.

Popular Use Cases

Religious dates

  • Find an Islamic holiday's civil date
  • Plan around Ramadan/Eid
  • Check a Hijri anniversary

Records

  • Convert a document's date
  • Align civil and Hijri records
  • Historical dates

Planning

  • Schedule around lunar months
  • Personal occasions
  • Event planning

What It Handles

Converts

  • Gregorian → Hijri
  • Hijri → Gregorian
  • Any date

Calendars

  • Gregorian (civil)
  • Hijri (Islamic lunar)
  • Month-accurate

Privacy

  • Client-side only
  • No network calls
  • Runs offline

Sources & References

Frequently Asked Questions

How does the Hijri calendar differ from the Gregorian?

The Hijri (Islamic) calendar is lunar: 12 months of 29–30 days totalling about 354 days, so it is roughly 11 days shorter than the 365-day Gregorian solar year. That's why Islamic dates move earlier through the seasons each year.

Why might a converted Hijri date be a day off elsewhere?

The Islamic calendar can be based on calculation (tabular) or on actual moon sighting, which varies by region. A calculated converter may differ by a day from a locally sighted date — confirm with your local authority for religious observances.

Can I convert in both directions?

Yes. Enter a Gregorian date to get the Hijri date, or a Hijri date to get the Gregorian equivalent.

Is my date data uploaded?

No. The conversion runs entirely in your browser; the dates you enter are never sent to a server.

What is the Hijri calendar used for?

It sets the dates of Islamic months and observances — including Ramadan, Eid al-Fitr, and Eid al-Adha — and is used for religious and some civil purposes in many countries.

🎓 Pro Tips

  • Tip 1: For religious observances, treat a calculated Hijri date as a guide and confirm locally, since moon-sighting can shift it by a day.
  • Tip 2: Remember Hijri dates drift ~11 days earlier each Gregorian year — useful when planning ahead.
  • Tip 3: Use the Hijri Calendar tool to view a whole Islamic month rather than a single converted date.