I have write own regex to detect is it mmyy or mm-yy format:

^((0[1-9])|(1[0-2]))[\/\.\-]*((2[0-9])|([0-9]))$

Demo is

Problem is this regex validates this wrong format: 036.

How to fit it?

CodePudding user response：

The pattern mm-yy and mmyy can be matched by the following regular expression (assuming yy can be from 00 to 99):

^(0[1-9]|1[0-2])[/.-]?([0-9]{2})$