When displaying time spans(ranges, periods), do I need the AM if the time ends in the PM?
For example, is it:
9:00 - 2:00 PM or 9:00 AM - 2:00 PM?
Will the user question whether it's AM or PM if I use 9:00 - 2:00 PM?
What about those that don't cross 12:00?
9:00 - 10:00 AM or 9:00 AM - 10:00 AM
Note: these are time periods for scheduled breakout sessions on a schedule for a conference. That might play into the answer, because it's quite obvious that the 9:00 meeting doesn't start at 9:00 PM.