Time line questions

[Tar Elenion]

As published in PoME JRRT wrote:

'Ages' last about 3000 years.
[and]
Of the Tale of Years in the latter ages
The 'First Age' ended with the Great Battle and the departure of the Elves and Fathers of Men, and the foundation of Numenor.
The 'Second Age' ended with the overthrow of Sauron, and the Loss of the One Ring.
The 'Third Age' is drawing to its end in the tales of the Shire and of the Hobbits...
Each 'Age' last[ed] somewhat more or less than 3000 years...
[and]
The Tale of Years in the Latter Ages.
The First Age was the longest. It ended with the Great Battle...

The First Age lasted longer than 580 years.