string - Regex Persian Date validation -

i want regular expression validation persian date 1396/4/3, 1396/12/08 or else.
in other words, want ensure format of persian date (as string) thing these valid formats are:

1.yyyy/mm/dd

2.yyyy/mm/d

3.yyyy/m/dd

4.yyyy/m/d

any solution?

use regex:

^(\\d{4})/(0?[1-9]|1[012])/(0?[1-9]|[12][0-9]|3[01])$ 

with regex:

• year 4 digits.
• month smaller equal 12
• day smaller equal 31