My clients appointment reminder is the wrong time

[SarahE]

I live in AZ and we do not observe daylight savings time. Every time daylight savings starts or ends it wreaks havoc with my schedule. Client's reminders are telling them to be an hour earlier than the actual appointment time. I don't understand how to fix it and when I call support, they tell me everything is correct on their end! Anyone else having this issue? It's driving me nuts!