Team Calendars edit event time picker validation may fail

Issue Summary

This is reproducible on Data Center: (yes)

Steps to Reproduce

1. create a 1 day event with date and time
2. edit the event
3. change the end time to an valid end time
4. save

Expected Results

no errors

Actual Results

invalid date error is thrown

Workaround

Select values in both time picker dropdown options will bypass the errors.