Islamic Finance Tool✨ New Release
Hijri to Gregorian Date Converter
Convert dates between the Islamic Lunar Hijri calendar (AH) and the Gregorian Solar calendar (CE) with astronomical calculations and moon sighting adjustments.
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Interactive Hijri to Gregorian Date Converter Workspace
Lunar Observation & Moon Sighting Notice
Islamic calendar dates are traditionally determined by actual physical sighting of the crescent moon (Hilal). Algorithmic tabular conversions can vary by 1 to 2 days depending on atmospheric visibility and local community moon-sighting declarations.
1. Conversion Direction
+0 Days
Converted Date Output1 Feb 2025 CEDay of Week: Wednesday (Estimated)
Mathematical Formula & Variables
Equation Model
Hijri Year ≈ (Gregorian Year - 622) × (33 / 32)Converts dates between the 354/355-day lunar Hijri calendar starting from the Migration (622 CE) and the 365/366-day solar Gregorian calendar using astronomical Julian Day Numbers.
Variable Definitions
| Symbol | Description |
|---|---|
| Hijri Date (AH) | Islamic calendar day, month, and year starting 622 CE. |
| Gregorian Date (CE) | Standard international solar calendar day, month, and year. |
| Moon Offset | ±1 or ±2 days adjustment for regional moon-sighting observations. |
How to Use the Hijri to Gregorian Date Converter
- Select your conversion direction: Hijri to Gregorian or Gregorian to Hijri.
- Enter the day, month, and year.
- Adjust the moon sighting offset slider if your local community follows physical moon sighting declarations.
- Click convert to view the corresponding converted date, day of the week, and Islamic month name in English and Arabic.
Hijri Date Conversion Example
Scenario Context: Convert 1 Ramadan 1447 AH to the Gregorian calendar.
Step 1: Input Hijri Date: Day 1, Month 9 (Ramadan), Year 1447 AH
Step 2: Compute Julian Day Number for 1 Ramadan 1447 AH
Step 3: Convert Julian Day Number to Gregorian solar date fields
1 Ramadan 1447 AH corresponds to approximately February 18, 2026 CE.
Frequently Asked Questions
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