Matching and capturing a date range

I can't get this to match for the life of me. I'm trying to match a date range and inject that into the filename. The date range in the file itself is July 1, 2021 - August 31, 2021
For my rule match I have
Contents > Contain Match >
but it doesn't seem to match properly. What am I doing wrong? Is there any way to properly get it to nab a date range with two dates in it?
For my rule match I have
Contents > Contain Match >
- Code: Select all
December 31,1999 - December 31, 1999
but it doesn't seem to match properly. What am I doing wrong? Is there any way to properly get it to nab a date range with two dates in it?