Board Thread:Skyrim/@comment-1.123.23.202-20140502084724/@comment-6881629-20151210180224

I assume 123.2.89.204 meant the College of Winterhold, or thinks Windhelm will get one of its own before the fifth era begins.

On topic i don't think the in-game date will go to the fifth era. Like Coppermantis said an era isn't a set amount of time but progresses on to the next because of significant events, the fourth era for example started after the Oblivion Crisis 3E 433 was the last year of the third era. I've heard it stops counting at 4E 405 but have no idea if thats true.