12:15 pm
12:44 pm
12:45 pm
12:59 pm
then
12:01 am
12:09 am
12:19 am

The differences aren't the same, they change and that is that Number I
wish to calculate/display in another Cell

With about 22 entries in between, not of the same interval.

I'd REALLY appreciate some help with this problem.

How can you subtract the times each time so you can Display the "time
interval"?