Alec went to the show at: 8:50 pm
If he returned 23 hours after, that means he returnes 1 days (24 hours) minus 1 hour, after.
So he came back the next day at: 7:50 pm.
Alec lives in NYC and Bonnie in LA.
If in LA it is 3 hours earlier than in NYC, we substract 3 hours from the NYC time:
7:50 pm - 3 hours = 4:50 pm
Answer: The time in LA was 4:50 pm