Thank you for this suggestion. I didn't even think of trying this because I thought "Time" was literally for the time and not date.
I just tried now but it doesn't work for my needs because I would need a filter like this:
Time > 07/08/2021
Time < 07/31/2021
But it seems that with Time, you can only select either CONTAINS or EXCLUDES.
I also tried:
Time CONTAINS July
Time CONTAINS 07
(since air dates are listed as "Friday, 07/02/2021 at 8:00 PM" for example)
In both cases, that returns 0 airings (without this Time filter, it now has 10 airings).
I'm willing to try other tags if you have other suggestions.