Event Time Zone is off

I am using 8.0.3494 (01b4e33) on Mac Big Sur 11.1

Whenever I send Event invites, they seem to be the right time until someone accepts (invited or myself). The time zones end up being off. This has been happening for a while and I brushed it off but going into 2021 it would be nice to find out why this keeps happening.

Yes, I looked at the other threads (from 2014 onwards) but have not found a solution in them.

Thank you