Is the Persian calendar the same as the Solar Hijri calendar?

Yes. The Persian (Jalali / Shamsi) calendar is the Solar Hijri calendar used in Iran and Afghanistan. Its year begins at the spring equinox (Nowruz), and the first six months have 31 days, the next five have 30, and Esfand has 29 or 30.

How accurate is the conversion?

It uses Borkowski's 33-year-cycle algorithm, which exactly matches the observational Solar Hijri calendar across the full modern range, pivoting through the Julian Day Number. Round-trips are exact.

Is my date uploaded anywhere?

No. The converter is privacy-first — all calculation happens locally in your browser and nothing is transmitted or stored.

Persian (Jalali) Calendar Converter

Persian (Jalali) calendar converter

Convert dates between the Gregorian and Persian (Solar Hijri / Jalali) calendars in both directions. The tool shows the matching date and weekday.

The Persian year starts at the spring equinox (Nowruz). This converter uses Borkowski’s 33-year-cycle algorithm, pivoting through the Julian Day Number, so it matches the observational Solar Hijri calendar for every modern date and round-trips exactly.

It is privacy-first: nothing leaves your browser.