Julian to Hijri (Islamic) Date Converter

Enter a date in the Julian calendar and the tool returns the equivalent date in the Hijri (Islamic) calendar using the standard relationship between the two systems.

1. 1

   Step 1

   Enter the complete Julian date — day, month, and year.

2. 2

   Step 2

   We anchor each system's epoch, then convert day by day — Julian: currently 13 days behind the Gregorian (14 from 2100); Hijri (Islamic): epoch 622 CE (2026 CE ≈ AH 1447–1448).

3. 3

   Step 3

   The result shows the correct Hijri (Islamic) day, with Hijri (Islamic) leap years applied date by date.

• 1

  Julian and Hijri (Islamic) dates do not map one-to-one — the two systems start from different epochs and count leap years differently, so enter the full Julian date and read the Hijri (Islamic) equivalent instead of shifting the year by a fixed offset.

• 2

  Watch century boundaries and very old dates in the Julian–Hijri (Islamic) system: historical calendars dropped or added days when they were adopted, which is invisible in daily use but material for long-range historical calculations here.

• 3

  Leap rules differ between the calendars behind Julian–Hijri (Islamic), so a span that looks like whole years in one system can land a day or two off in another; trust the converted result rather than a fixed mental offset.

• The Julian and Hijri (Islamic) calendars differ in year length and leap pattern, so a fixed-day offset — 365, 354, any memorized constant — drifts the Hijri (Islamic) date badly. Convert the complete date so both leap rules apply.

• Anniversaries do not survive conversion unchanged: a Julian date maps to a fixed Hijri (Islamic) date, but next year's Julian anniversary lands on a different Hijri (Islamic) date. Reconvert each occurrence instead of adding one year to the last result.