6 ms·

They get the locations from the tz database. https://en.wikipedia.org/wiki/Time_in_Indiana#tz_database https://en.wikipedia.org/wiki/Time_in_Indiana#tz_databas

• maxwell 6y ago
  From the source: # Shanks partitioned Indiana into 345 regions, each with its own time history, # and wrote "Even newspaper reports present contradictory information." # Those Hoosiers! Such a flighty and changeable people! # Fortunately, most of the complexity occurred before our cutoff date of 1970. # # Other than Indianapolis, the Indiana place names are so nondescript # that they would be ambiguous if we left them at the 'America' level. # So we reluctantly put them all in a subdirectory 'America/Indiana'. https://github.com/eggert/tz/blob/e6c1f0e7daa0b6c5131b2976c6be9190845d2b49/northamerica#L853 https://github.com/eggert/tz/blob/e6c1f0e7daa0b6c5131b2976c6...