Regex to match date formats DD-MM-YYYY and DD/MM/YYYY

I'm working in Sublime Text 3 with a large text file that has entries separated by lines. I'm looking for a regular expression that will:

Match entries that appear in the DD-MM-YYYY format
Match entries that appear in the DD/MM/YYYY format

If both would be too complicated, then just the first example will do.

I haven't done anything to work towards such a regex, because it's honestly way above my knowledge of it and I wouldn't know where to start, and looking at similar answers dealing with regex validation of date formats confirms those suspicions for me.

Thanks in advance for any help.

Solution

This pattern will work for your conditon. Strictly not allowed month to date and vice versa.

^([0]?[1-9]|[1|2][0-9]|[3][0|1])[./-]([0]?[1-9]|[1][0-2])[./-]([0-9]{4}|[0-9]{2})$

This pattern will match these formats: (Date, Month, Year)