Python Regex matching any order

Lets say I have datetime in the format

12 September, 2016 September 12, 2016 2016 September, 12

I need regex like it should return match in same order always for any dateformat given above

match-1 : 12 match-2 : September match-3 : 2016

I need results in the same order always. Help me Guys Plese