Persian Calendar Converter - Islamic Date Converter

Guide

Convert Persian Solar Hijri and Gregorian dates

The Persian Calendar Converter changes Gregorian dates into Persian Solar Hijri dates and converts Persian input back into Gregorian dates.

This page is for the Persian Solar Hijri calendar. It is not the same as the Islamic Hijri lunar calendar used by the Islamic Date Converter pages.

Use this converter when your source refers to the Iranian/Persian solar calendar, where the year follows the solar cycle and month lengths are not the same as Islamic lunar Hijri months.

What it handles

Persian Solar Hijri conversion coverage

Gregorian to Persian

Enter a Gregorian date and return the matching Persian Solar Hijri year, month, day, and month name.

This direction is useful when a record, schedule, or publication starts from the international Gregorian calendar but needs a Persian Solar Hijri equivalent. The result includes both the numeric date and readable Persian month label.

Because the Persian calendar is solar, the converted year and month pattern will not match the Islamic lunar Hijri result for the same Gregorian day.

Persian to Gregorian

Enter a Persian date in YYYY-MM-DD format and convert it back into Gregorian format.

Use this direction when the source date is already written in the Persian Solar Hijri calendar. The form expects a complete numeric year, month, and day so the date can be validated before conversion.

If a source uses a Persian month name, convert that name to its month number first and then check the result label after conversion.

Arithmetic 33-year cycle

The converter uses a deterministic Persian leap-year model for stable Solar Hijri lookup.

A deterministic leap-year model makes the same input return the same output every time, which is useful for records, testing, and comparison tables. It also lets the form reject impossible Persian dates instead of rolling them forward silently.

The model is intentionally separate from the Islamic civil Hijri calculation elsewhere on the site. Similar names do not mean the calendars share month lengths or year lengths.

How to use

How to convert Persian dates

1

Choose a direction

Use Gregorian to Persian when your source date is Gregorian, or Persian to Gregorian when your source date is Solar Hijri.

Choosing the direction first helps avoid mixing calendar assumptions. A Gregorian source date and a Persian Solar Hijri source date are validated differently and should not be typed into the same field.

If your source only says "Hijri," confirm whether it means Persian Solar Hijri or Islamic lunar Hijri before using this page.

2

Enter one date

Persian input should use numeric YYYY-MM-DD format, such as 1405-04-10.

The numeric format keeps input unambiguous and makes it easier to copy dates from spreadsheets, forms, or data exports. The converter checks the Persian month and day before returning a Gregorian result.

Complete dates are required because a Persian year or month alone cannot map to one exact Gregorian day.

3

Read the calendar label

The result includes a Persian month name so you can verify the numeric month.

The month label is a quick check that the numeric month was interpreted the way you expected. This is helpful when a source date was transcribed from text or translated from another notation.

Keep the calendar label with the converted result when sharing it, especially in contexts where Islamic Hijri dates also appear.

Examples

Persian conversion examples

Gregorian date to Persian date

2026-07-01 -> 1405-04-10

The Gregorian date 2026-07-01 converts to Tir 10, 1405 SH in this arithmetic Persian calculation.

This example shows how a mid-year Gregorian date maps into the Persian solar year and month structure. It is useful as a reference when checking that the page is using Solar Hijri rather than Islamic lunar Hijri.

The month label Tir is included to make the numeric month easier to verify after conversion.

Persian date to Gregorian date

1405-04-10 -> 2026-07-01

The Persian input 1405-04-10 converts back to Gregorian 2026-07-01.

The reverse example confirms that both directions share the same day-number bridge. It is a useful check when validating imported Persian dates or a cross-calendar table.

If another converter differs, compare the leap-year rule and calendar basis before assuming the date was typed incorrectly.

FAQ

Persian calendar questions

Is Persian Solar Hijri the same as Islamic Hijri?

No. Persian Solar Hijri is a solar calendar. Islamic Hijri is a lunar calendar with different month lengths and year lengths.

The shared word Hijri can be confusing because both calendars count years from a related historical era, but their mechanics are different. Persian Solar Hijri follows the solar year, while Islamic Hijri follows lunar months.

Use this Persian page for Solar Hijri dates such as Iranian civil dates. Use the Islamic converter pages for lunar Hijri dates such as Ramadan or Shawwal references.

What Persian input format is accepted?

Use YYYY-MM-DD with a numeric Persian year, month, and day.

The form does not parse Persian month names or partial dates. Enter a complete numeric date so the converter can validate the month length and return one exact Gregorian day.

Leading zeroes for month and day make copied values easier to scan and reduce mistakes in tables or issue trackers.

Reference

Persian conversion reference notes

The converter maps Gregorian and Persian dates through a shared Julian Day Number, using a deterministic 33-year Persian leap-year rule.

The Julian Day Number gives both directions a neutral day reference, which keeps Gregorian-to-Persian and Persian-to-Gregorian results aligned. It also helps technical users compare this output with another implementation.

The Persian Solar Hijri calculation is separate from the Islamic civil Hijri calculation used elsewhere on the site. When documenting results, label them as Persian Solar Hijri or SH to avoid ambiguity.

Use cases

When Persian Solar Hijri conversion is useful

Civil record conversion

Convert dates between Gregorian and Persian Solar Hijri formats for forms, documents, or data tables.

This is useful when a dataset has to serve audiences who read different civil calendars. Keeping both Gregorian and Persian Solar Hijri values side by side makes records easier to search and verify.

The converted value should remain paired with the original date so later reviewers can see which calendar was the source.

Avoid Hijri ambiguity

Use this page when the source is Solar Hijri/Persian, and use the Islamic converter when the source is lunar Hijri.

A date labeled only as Hijri can be ambiguous without context. Persian Solar Hijri and Islamic lunar Hijri can produce very different year, month, and day values for the same Gregorian date.

When building documentation or import tools, store the calendar name explicitly instead of relying on the word Hijri alone.

Round-trip checks

Convert a date both directions to confirm you are using the same calendar model and numeric format.

Round-trip checks are useful for spreadsheet formulas, migrations, and QA fixtures. If Gregorian to Persian and Persian to Gregorian do not return the original date, the source format or calendar basis may have been mixed.

Use the visible month label and the original numeric value together when checking copied dates.

Extra Persian calendar notes

Does this accept Persian month names?

No. Enter the date numerically in YYYY-MM-DD format, then use the result label to confirm the month name.

Numeric input avoids spelling, transliteration, and translation differences in month names. It also lets the converter validate the date without guessing which spelling the source intended.

If your source gives a month name, convert it to the corresponding month number before entering the date.

Why mention Solar Hijri?

The Persian calendar is solar. Calling it Solar Hijri helps distinguish it from the Islamic lunar Hijri calendar.

The distinction matters because solar and lunar calendars move differently through the Gregorian year. A Persian Solar Hijri date should not be converted with an Islamic lunar Hijri tool.

Using the full label also helps readers understand why this page appears alongside Islamic calendar tools while following a different calendar system.

Can Persian leap years affect results?

Yes. The final month length depends on the leap-year rule used by the converter, so impossible dates are rejected.

Leap-year handling affects whether the final Persian month has an extra valid day. The converter validates that rule before accepting a Persian input date.

If another converter uses a different Persian leap-year model, results near the end of the year may need closer comparison.