Alberta is doing the same November 1st as well - they are even getting their own timezone...

(lots of rush work, Microsoft is still "validating" this new TZ in M365/SPO/OneDrive, users who tried to use that new TZ yesterday, changing their SPO sites end-up broken and unable to load without hitting system pages via URL... users who had changed their desktop OS TZ couldn't edit List items... it was a "fun" day...)