Persian (Jalali) to Coptic Date Converter

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

1. 1

   Step 1

   Enter the complete Persian (Jalali) date — day, month, and year.

2. 2

   Step 2

   We anchor each system's epoch, then convert day by day — Persian (Jalali): the Persian year ≈ 2026 − 621 = 1405; Coptic: the Coptic year ≈ 2026 − 284 (it begins ≈ 11 September).

3. 3

   Step 3

   Read the exact Coptic date: a year spanning 365–366 days, counted month by month.

• 1

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

• 2

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

  Enter the Persian (Jalali)–Coptic dates in YYYY-MM-DD format to avoid ambiguity — some conventions read 03/04 as March fourth and others as April third, and a swapped month and day silently shifts every result this page derives.

• Reversing the direction is a silent trap: converting from the Coptic calendar back to the Persian (Jalali) calendar needs the inverse relation, and off-by-one errors cluster at month boundaries where the systems disagree. Verify the round trip returns your original date.

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