Julian to Persian (Jalali) Date Converter

Enter a date in the Julian 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 Julian date — day, month, and year.

2. 2

   Step 2

   We apply both systems' rules: a Julian 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

  Julian 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 Julian date and read the Persian (Jalali) equivalent instead of shifting the year by a fixed offset.

• 2

  For deadlines tied to authorities or contracts, confirm which calendar the deadline officially uses before converting it here — a Julian–Persian (Jalali) date read in the wrong system can be off by days or even a full year.

• 3

  Leap rules differ between the calendars behind Julian–Persian (Jalali), 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 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.

• Reversing the direction is a silent trap: converting from the Persian (Jalali) calendar back to the Julian 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.