Time in Middle-earth

[Galadriel55]

Originally Posted by Kuruharan

Which is kind of curious if they were really so isolated, where did they become so familiar with hours to know how far one could walk in an hour?

I think on that basis we must suppose that they used hours for telling time themselves.

I suppose the "hour" was an ancient concept, and the Druedain must have interacted at least a little bit with Men in the past, giving rise to common time-language. However, considering that no or few such interactions occurred in the past generations, it's a wonder they would still keep that knowledge if they had a more convenient way of counting time.