Persian (Jalali) Days in Month Calculator

Enter the date values and the tool computes the result for the persian calendar system.

1. 1

   Step 1

   Enter your date in the Persian (Jalali) calendar: day, month, and year.

2. 2

   Step 2

   We apply the Persian (Jalali) epoch and leap rules — the Persian year ≈ 2026 − 621 = 1405.

3. 3

   Step 3

   The output breaks down years, months, and days on real Persian (Jalali) lengths.

• 1

  This Persian (Jalali) Days in Month follows Persian (Jalali) calendar rules — its own epoch, month lengths, and leap years — so the result can differ from a Gregorian-based calculation of the same date; treat the calendar system as part of the input.

• 2

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

• 3

  Enter the Persian (Jalali) 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.

• Intercalation is system-private: the Persian (Jalali) year runs 365–366 days because leap months follow rules no other calendar shares, so a Gregorian every-fourth-year reflex misreads persian (jalali) dates. Let the tool apply the persian (jalali) rule to a month-length check.

• Copied results lose their calendar context: a Persian (Jalali) date pasted into a document or app that assumes Gregorian silently misstates anniversaries and deadlines by years. Label the system whenever the result leaves this page.