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Those two things are called the time zone - a geographical area that has and had the same time all the time - and the zone time within that time zone which might change from time to time, for example regularly because of daylight saving time or kind somewhat randomly because people change their mind about which time they want to use.

Quick reminder that those timezone abbreviation are not unique (i.e. Philippine Standard Time)

https://www.timeanddate.com/time/zones/

Until daylight savings time ends and it's 1:30am twice. Time is hard.