Assyrian to Persian (Jalali) Date

Enter a date in the Assyrian calendar and the tool returns the equivalent date in the Persian (Jalali) calendar using the standard relationship between the two systems.

1. 1

   Step 1

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

2. 2

   Step 2

   We apply both systems' rules: a Assyrian year runs about 365 days against the Persian (Jalali) 365 (≈0 days apart each year).

3. 3

   Step 3

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

• 1

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

• 2

  Watch century boundaries and very old dates in the Assyrian–Persian (Jalali) 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

  Before a Assyrian–Persian (Jalali) date goes into a booking or a flight, re-enter it in a second tool as a cross-check — pages like Assyrian to Persian (Jalali) Date Converter apply fixed rules and cannot warn about a transposed input digit.

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

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