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From Wikipedia:

The United States uses nine standard time zones. As defined by US law[4] they are:

  1. Atlantic Time Zone
  2. Eastern Time Zone
  3. Central Time Zone
  4. Mountain Time Zone
  5. Pacific Time Zone
  6. Alaska Time Zone
  7. Hawaii–Aleutian Time Zone
  8. Samoa Time Zone (UTC−11)
  9. Chamorro Time Zone (UTC+10)

Wonderful. And how absolutely interesting.

Thank you for taking the time and trouble to post this.

This means that no part of the continental US follows the 'Atlantic Time Zone'; somewhere in my mind, I had thought that Maine might have done so.
 
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