Persian calendar

[HansMuller]

This issue was originally reported against the Flutter project: https://github.com/flutter/flutter/issues/28926

The problem has to do withPersian week names:

This package very useful for Persians but I have a problem This package don’t support week mood

[saeedgir]

Hi @HansMuller There are some problem in Intl library for Persians.

• First day of week in Persian calendar is Saturday and is not Sunday
• Persian calendar is Shamsi or Jalali
• Month's name and month's length in Persian calendar is difference
• Some times need to use different currency that isn't official

[setbap]

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