1- in Calendar Settings after change field(Alternate calendar) to:
Hijri calendar - standard
or
Hijri calendar - Kuwaiti
or
Hijri calendar - Saudi
or
Chinese calendar - Traditional Chinese
or
Chinese calendar - Simplified Chinese
or
Persian calendar
or
Hebrew calendar

after enable this Options
In the main calendar page calendar view Two dates (default Calendar + My country Calendar ), which was chosen from a list( Alternate calendar) in Calendar Settings for acount google with the default Calendar
we need view and implementation in this app

2-in the main calendar In the top menu in youre app are presented the year with a month needed to change the font + and display the day and Two dates (default Calendar + My country Calendar )

Addition is very important in the program