@imath
Thanks for your help
That note was very helpful.
According to the image below, the Date Selector field is related to choosing the date of birth and…
This is the part I was looking for, which is apparently not compatible with WordPress’ core historiography system and cannot be used with Shamsi date in Persian language (after using the Shamsi-Jalali plugin).
I think, if possible, that the system of historiography
Change BuddyPress to the default WordPress system, it’s better
(Things like choosing the date of birth and…)
So that users who use other history systems can also benefit from it
If possible, make the buddypress date section like the core of WordPress so that Persian speaking people can easily change the date to JAJALI with common plugins.