To clarify, I mean European outsiders. Knowing what communication was like among native populations was the intent of this question.
In addition, would they have known that traveling substantially east or west would change their "noon?" Would an overland traveler without a timekeeping device even notice the change?
I don't know about the second part of your question, but an almost identical question was asked about Inuits in this same subreddit about two years ago, with several informative answers from modern Inuit redditers such as /u/skytomorrownow and /u/anguishsustainsme among others.
Just an aside: Eskimo is an outdated term. Inuit is much preferred.