Jalali Calendar
Will Gnome
add the Jalali (=Persian=Shamsi) calendar as a default calendar, like what KDE has?
I saw that KDE has many calendars that can be used as default instead of Gregorian calendar.
Solution 1:
Are you using Gnome Shell? If yes, have a look at this extension: https://extensions.gnome.org/extension/240/persian-calendar/