For example:  03/12/07
For that you have to write like,
[0-9][0-9]/[0-9][0-9]/[0-9][0-9]

for example date formate is dd/mm/yy
than [0-3][0-9]/[0-1][0-2]/[0-9][0-9]

For example date format is dd/mm/yy

than [0-3][0-9]/[0-1][0-9]/[0-9][0-9]

If the date field is in the following format

'mm/dd/yy'
[0-1][0-9]/[0-3][0-9]/200[0-9]

dd-mm-yy format then it will be

[[0-3][0-9]]&&[^3[2-9]^00]-[[01][0-9]]&&[^1[3-9]^00]-\d{2}

please rectify me if you find it to be incorrect or with
some minor error, as i'm not completely sure about the part
after '&&', i mean, the error is not in the logic but in the
syntax of using the AND and OR operators.