Persian (Jalali) to Julian Date Converter

Enter a date in the Persian (Jalali) calendar and the tool returns the equivalent date in the Julian 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 apply both systems' rules: a Persian (Jalali) year runs about 365 days against the Julian 365 (≈0 days apart each year).

3. 3

   Step 3

   The result shows the correct Julian day, with Julian leap years applied date by date.

• 1

  Persian (Jalali) and Julian 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 Julian 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 Persian (Jalali)–Julian date read in the wrong system can be off by days or even a full year.

• 3

  Time zones can move a Persian (Jalali)–Julian date by a full day around midnight: today in one zone is still yesterday or tomorrow in another, so anchor the calculation to the zone your event actually follows before you enter anything.

• Epoch offsets are pair-specific: day zero of Persian (Jalali) and of Julian are different dates, and constants borrowed from another calendar pair are silently wrong by days or years. Use the Persian (Jalali) → Julian relation itself, not a remembered number.

• Reversing the direction is a silent trap: converting from the Julian 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.