Example use:
$ node index.mjs 2023-07-18 17:00 1H15M Europe/Madrid America/Chicago America/Los_Angeles Asia/Seoul
5:00 PM to 6:15 PM Central European Summer Time
10:00 AM to 11:15 AM Central Daylight Time
8:00 AM to 9:15 AM Pacific Daylight Time
12:00 AM to 1:15 AM Korean Standard Time