I'm trying to poke holes in the "always use UTC and you're good" advice. I have actually encountered this scenario, and I didn't know how to apply that advice.
There's a much simpler one - recurring meetings/events (in-person or local-ish like within one country) that cross a DST boundary. You always want these to be attached to a local time zone, so it doesn't suddenly happen an hour earlier/later than you intended.
open | close | store 6am | 6am | default 7am | 12pm | store1
table stores: name | address store1 | xyx NYC
If you can't find the store in the timetable:
1. Get the timezone of the target store by looking up the address from the table stores
2. Set Hours from the default row in the timetable table on the object with the timezone