Check Dates in an InDesign Document

Hello, I need to check all the dates (day/date/month) in an Indesign document to a list of predetermined fixtures (around 200 dates) to make sure they are correct.

My plan is to search the document using the following grep find…

(Monday|Tuesday|Wednesday|Thursday|Friday|Saturday|Sunday)\s(1|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|19|20|21|22|23|24|25|26|27|28|29|30|31)\s(January|February|March|April|May|June|July|August|September|October|November|December)

…then check the text found against my list of fixture, if its not found it would show an alert.

Can anyone tell me if there is a better way and where they would start scripting in Applescript?

many thanks
LJ