We want to show multiple dates for the event, each with its own start and stop time.
Day 1 Start Time #1 Stop Time #1 Day 2 Start Time #2 Stop Time #2
But in custom data (Administer > Customize Data and Screens > Custom Fields), it doesn't seem to be possible to add a field that is just a time without a date.
I realize we could create two fields, each of which contains both a date and a time:
Day 1 Start Day 1 End Day 2 Start Day 2 End
But we'd have to enter each date twice, extra work and introducing an opportunity for errors in entering the redundant information. For each day of the event, we want to enter three items: the date, a start time and a stop time.