In The Wheel of Time series, Robert Jordan states in his post-book interviews (audiobook version, at least) that the "Age of Legends" and beyond are supposed to be similar to our real-life modern times. Their past is our present.
There are many descriptions that seem similar to modern vehicles and items to support this (trucks, helicopters, planes, guns, etc.) Some are from the First Age and some from the Age of Legends, but I can't remember which goes where. Other descriptions seems futuristic, even for 2018.
What real-life time periods do the First Age and Age of Legends represent?