I`m using Persian calendar.
When I add a new User profile field of type Date/Time . when I want to pick a date in Edit profile page it automatically changes after save .
I`m using moodle 3.3 and calander version :
$plugin->version = 2017030200;
$plugin->requires = 2013110100;
$plugin->component = 'calendartype_jalali';
$plugin->release = '1.1 for Moodle 2.6 onwards';
$plugin->dependencies = array('calendartype_gregorian' => ANY_VERSION);
$plugin->maturity = MATURITY_STABLE;