There is not, IIRC, a user-side fix to this in all cases. Sometimes, there is a back-end issue that has the time zone incorrectly set. SUAC may be able to help on a case-by-case basis if the recommended self-help (verifying ZIP code, etc) doesn’t resolve itself. There’s a more recent discussion here (Reminder Email Showing Wrong Start time - #64 by DerekBrewer) that may get you pointed in the right direction.