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Hijri Date Converter Calculator

Work out hijri date converter instantly with clear inputs, formula shown and shareable results.

About Hijri Date Converter Calculator

This uses the tabular (Kuwaiti) arithmetic Islamic calendar, converting through the Julian day number with a 30 year cycle of 10,631 days. The tabular calendar is arithmetic rather than observational, so it can differ from a locally announced date by a day or two, which is why the adjustment field exists.

Formula

Tabular conversion

convert the Gregorian date to a Julian day number, then apply the 30 year, 10,631 day arithmetic cycle

Worked example

With the default values below, Hijri Date Converter Calculator returns Hijri date of 21 Rabi al-Awwal 1448 AH. Change any input above and every figure here is recalculated in your browser.

Inputs used

Gregorian date
2026-09-04
Day adjustment for local sightingone of Two days earlier, One day earlier, No adjustment (tabular), One day later, Two days later
No adjustment (tabular)

Results

Hijri date
21 Rabi al-Awwal 1448 AH
Hijri year
1,448
Hijri month number
3
Day of the Hijri month
21

Step by step

  1. 1Values used
  2. 2Tabular conversion
  3. 3Hijri date= 21 Rabi al-Awwal 1448 AH
  4. 4Hijri year= 1,448
  5. 5Hijri month number= 3
  6. 6Day of the Hijri month= 21

Assumptions and limits

  • The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to whole numbers, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How is the Hijri Date Converter figure worked out?

convert the Gregorian date to a Julian day number, then apply the 30 year, 10,631 day arithmetic cycle. This uses the tabular (Kuwaiti) arithmetic Islamic calendar, converting through the Julian day number with a 30 year cycle of 10,631 days.

Why does this matter?

The tabular calendar is arithmetic rather than observational, so it can differ from a locally announced date by a day or two, which is why the adjustment field exists.

What do I need to enter?

Enter gregorian date, day adjustment for local sighting. The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.

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