I was once 5 hours late to a fairly important meeting because the Teams calendar was showing the time in UTC instead of my zone. Never determined why.
And then there’s the “helpful” way teams resets the calendar view: let’s say I’m going back through calls from last week to see how long they took. In Teams, I go back a week, click the calendar item, record the time in my app, then go back to the calendar view and…I’m on this week. Neat. Intuitive.
Are they on a VPN to another time zone?