Both calendars use leap years, but the Solar Hijri leap year occurs every 4 or 5 years based on complex astronomical observations, whereas the Gregorian calendar follows a fixed mathematical rule (every 4 years, with century exceptions). 4. How to Convert Specific Dates
If the Shamsi date is from to Esfand 30 , then: tarikh shamsi b miladi
: The Solar Hijri calendar starts from the year 621 AD, when Prophet Muhammad migrated from Mecca to Medina, but it does so on the basis of the solar year. The first day of the first month (Farvardin 1) of the Solar Hijri calendar corresponds to the vernal equinox. Both calendars use leap years, but the Solar
| | Gregorian Date | |------------------------|-------------------------| | 1 Farvardin 1400 | March 21, 2021 | | 1 Dey 1400 | December 22, 2021 | | 1 Farvardin 1401 | March 21, 2022 | | 1 Farvardin 1402 | March 21, 2023 | | 30 Esfand 1402 (leap) | March 19, 2024 | | 1 Farvardin 1403 | March 20, 2024 (equinox was March 20 at 06:36 AM Tehran time) | | 1 Farvardin 1404 | March 20, 2025 | | 1 Farvardin 1405 | March 20, 2026 | The first day of the first month (Farvardin
Here are the 12 months of the Tarikh Shamsi B Miladi calendar: