Thank you so much for your quick response, Andras.
I double checked the time zone settings you referenced.
Our site-wide time zone setting is PST (Los Angeles, CA) and I made sure the Events>Settings?General>Time Zone mode is set to site-wide, as you recommended.
Then I went back and re-saved my originally-entered event date/time of 3/6/21, 8pm-10pm PST (time zone is Los Angeles). When I preview the Event, unfortunately it is still showing incorrectly, as happening on 3/7/21, 4am-6am PST.
Is there any way to send/include/show you screen snips to illustrate if that would help?
Any other ideas what might be happening and how to fix it?
Thanks, again, Andras.