Searching for a specific String-Format

Searching for a specific String-Format

Hey there,

i have a little problem I can't really solve. I have a given website where I want to color dates that are overdue by a red font color. The problem is this. The date is implemented in a DD.MM.YYYY format in a title attribute of a span tag.

Is there a possibility to get back all elemets that contain a title with the format "XX.XX.20XX" where the X has to be a number? Thanks in advance for your help and 

Greetings Chris