Big one right now popping up again - esp with the WFH crowd.
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All meeting invites, mentions of time, meeting requests, emails mentioning a certain time, etc etc == SHOULD BE IN THE DEALERS TIME/TIMEZONE. It is YOUR job as a vender to know what time/timezone the dealer is in -- as a sales/pitch person or as the support rep for a product the dealer is already paying for.
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Took 3 emails to verify a time -- vender says "meeting is at 1PM CST", dealer emails asking what time is that in "their state", vender said dont know but it is XX:XX here now, dealer emails back "ok, looks like 2 hours from now"
When you say 1PM CST to a dealership employee -- they will see 1PM... and blow over the CST. If they do see the CST, conversations like above will happen. Creates confusion and disconnect, missed meetings, etc.