Tarikh Shamsi B Miladi __top__

Birth certificates, passports, and contracts in Iran use Shamsi dates. International courts or visa applications require Miladi conversion. An off-by-one error can invalidate a document.

| Mistake | Consequence | Solution | | :--- | :--- | :--- | | Simply adding 621 days (not years) | Off by centuries | Add years, then adjust month/day | | Ignoring month boundaries | Wrong season | Use conversion table | | Assuming both leap years match | 1-day error in Feb/March | Check both calendars’ leap status | | Converting year only | Ambiguous result | Always include month and day | tarikh shamsi b miladi

There is no single simple equation due to the varying leap years, but here is the logical approach used by programmers and astronomers. Birth certificates, passports, and contracts in Iran use

The safest method is to convert the Shamsi date to an absolute day count (JDN), then convert that to Gregorian. | Mistake | Consequence | Solution | |

So the rule is: But since you don’t know Gregorian beforehand, use an online tool.