The Third Age now has a name

[robkelk]

And so do the First and Second Ages.

For that matter, the First, Second, and Third Ages are now defined.

What? Oh, right. The Holocene Epoch has, for the first time, been divided into three Ages: Greenlandian (11,700-8,300 years ago), Northgrippian (8,300-4,200 years ago), and Meghalayan (4,200 years ago - present).

[Labster]

Based on fossil evidence of when the Elves finally went the Gray Havens, I suppose.

It's a bit funny to partition, though, because the Holocene was super short, anyway.  And I do use past tense, as I'm pretty sold on the Anthropocene concept.  We have all sorts of new minerals like fordite a.k.a. Detroit Agate, trinitite, and corium.  The changes in isotope ratios are already apparent in the ice cores.  And not to mention the ongoing mass extinction.