Wrong date - Incorrect islamic date conversion [solved]

Coin: https://en.numista.com/catalogue/pieces6326.html

It looks that this coin use two different calendar types, one "Iranian - persian" 1338-1354
And second calendar year 2536 (or it's just wrong year).
Anyway when these dates converted to Gregorian dates it becomes 1959-3157.

Hello,
Several years ago, (beginning of 1355 Persian calendar) Iran's calendar changed to "Imperial Calendar".
The beginning of this calendar is Coronation of Cyrus. After 3 years (1357 Persian calendar) Iran's calendar Changed back to Persian Calendar.
So, all dates are correct.
You can find more info and conversion tool here:
https://en.numista.com/numisdoc/calendar-persian-31.html

Hello,
I fixed the coin page so that 2536 is correctly converted in 1977.