- First I install persian calendar
- I add a custom profile field to get Date of birth of users
- In this case users can pick a date (solar date)
- when a user wants to save profile settings
- date changes automatically
- and saves a negative number for time in DB
But I found my answer . the profilefield_datetime plugin uses min and max date based on Gregorian calendar . I fixed my problem by convert to Gregorian date before processing date :
In profilefield_datetime and in field.class.php and in "edit_save_data_preprocess" method I replaced This line :
$datetime = userdate($datetime, '%Y-%m-%d-%H-%M-%S');
by
$datetime = date('Y-m-d-H-m-s', $datetime);