Persian Date Converter
Convert any date between the Gregorian and Persian (Solar Hijri, Jalali) calendars instantly, with localized month names, weekday display, a today button and day stepping. Runs fully in your browser.
What is the Persian calendar?
The Persian calendar, also called the Solar Hijri or Jalali calendar, is the official calendar of Iran and Afghanistan. It is a solar calendar: the year begins at the vernal equinox, so every date stays locked to the seasons, unlike lunar calendars that drift through the year.
How does this converter work?
It uses the Solar Hijri calendar data built into your browser through the standard JavaScript Intl interface. Pick a Gregorian date and the Persian equivalent appears at once, or choose a Persian day, month and year and the Gregorian date is found by locating the exact matching day. No server is involved.
How is the Persian year counted?
Years are counted from the Hijra, the migration of the Prophet from Mecca to Medina in 622 CE. Persian year 1405 begins on Nowruz, 21 March 2026, and ends in March 2027, so the Persian year runs almost parallel to the Gregorian year — only about nine and a half centuries behind it.
How are the months and days structured?
The year has twelve months. The first six, from Farvardin to Shahrivar, have 31 days each; the next five, from Mehr to Bahman, have 30 days each; and the last month, Esfand, has 29 days — or 30 in a leap year. A common year is 365 days and a leap year 366.
How do Persian leap years work?
A leap year is determined astronomically by the timing of the vernal equinox: if the equinox falls after noon in Tehran, the year that follows becomes a leap year and Esfand receives a 30th day. Leap years occur roughly every four years, but not on a fixed mathematical rule.
What is Nowruz?
Nowruz is the Persian New Year, celebrated at the exact moment of the vernal equinox, around 20 or 21 March. It is one of the oldest holidays in the world and is marked with the haft-sin table, spring cleaning and family gatherings across Iran, Afghanistan, Central Asia and beyond.
Is this the same as the Islamic lunar calendar?
No. The Islamic (Hijri) calendar is lunar, so its months drift through the seasons and Ramadan moves about 11 days earlier each solar year. The Persian Solar Hijri calendar is solar, so 1 Farvardin always falls at the start of spring. Dates in the two systems can differ by many years.
Is any data uploaded?
No. Every calculation happens locally inside your browser tab — no network requests, no cookies, no tracking — and the converter keeps working even when you are offline.
How to Use Persian Date Converter
This Persian date converter translates any date between the Gregorian calendar and the Persian Solar Hijri (Jalali) calendar using the calendar data built into your browser — with month names localized into your language, weekday display, a today button and one-day stepping. Nothing is uploaded.
- Pick or type a Gregorian date in the left block — the equivalent Persian date with its weekday appears instantly on both sides.
- For the reverse direction, choose the Persian day, month and year in the right block and the matching Gregorian date shows below.
- The month menu always lists the twelve Persian months from Farvardin to Esfand with localized names.
- Use the −1 / +1 buttons to step a single day across month and year boundaries, for example around Nowruz in late March.
- Press "Go to today" at any time to jump back to the current date in both calendars.
The Persian day starts at midnight, but the year starts at the vernal equinox: 1 Farvardin falls on 20 or 21 March in the Gregorian calendar. Leap years add a 30th day to Esfand, the last month.
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