It's fine to ask questions again. Pointing out the FAQ and previous answers is a starting point, not to discourage further questions. Follow-on questions, information, and debate is welcome.

These are the two links in the FAQ section Clocks / Time zones and time differences, https://www.reddit.com/r/AskHistorians/wiki/language#wiki_clocks . (In the app, the # anchor doesn't work, so you have to look for that section header.)

"At what point did humans understand the existence of timezones - i.e. that the sun didn't rise and fall the same way everywhere?" at https://www.reddit.com/r/AskHistorians/comments/7ahhv3/at_what_point_did_humans_understand_the_existence/ , answers by /u/restricteddata and /u/jschooltiger

"When did people understood the concept of time zones (that when it's morning in america it's night in Europe)?" at https://www.reddit.com/r/AskHistorians/comments/3uufv2/when_did_people_understood_the_concept_of_time/cxhy3fd/ by jschooltiger

Other previous discussions:

"How long did it take Columbus to realize he wasn't in Asia?" at https://www.reddit.com/r/AskHistorians/comments/sfzx1/how_long_did_it_take_columbus_to_realize_he_wasnt/ , answer by /u/jabbercocky

"Did the early Europeans (flat-world era) have any inkling of times zones. If so how did they explain these things..." at https://www.reddit.com/r/AskHistorians/comments/wpro0/did_the_early_europeans_flatworld_era_have_any/ , reply by Crevecoeur

"Did people in ancient and medieval times know about time zones?" at https://www.reddit.com/r/AskHistorians/comments/4z5u3y/did_people_in_ancient_and_medieval_times_know/ , reply by qed1