Help with adding Persian dates

How can I add Persian date to my app?
Is there a case study on this subject?
Thank you...

Does this help in any way ?

Hello ahatbek

I don't know of a case study, but is there a formula that converts Gregorian dates to the Persian dates? I see there are websites that can do it, which should mean you can do it too, either with App Inventor's math blocks or Javascript.

Here is a javascript file that provides the calculations for conversion:
from this page

I solved the problem.
I added a Persian calendar to the program.
You can see this tutorial in the following link.