How long between 2.0 and 3.0?

I thought I saw a confirmation that about 2 years occurred between the start of 2.0 and the start of 3.0, but I can't find a source for that.

Am I just remembering? Did we ever get a definitive statement on the timeline?

Less than a year from the start of 2.0. Always less then a year, if for no other practical reason than that "five years since the Calamity" is a frame of time referenced in too many quests to make it flexible.

I've always wondered how long the trip to see Nidhogg was? Did that only take a few days?

I believe it was stated somewhere that approximately 2 weeks - 2 months took place between the end of 2.x and 3.0.

As for how long the trip to go see Hraesvelgr was, up in the air. I'd put it at a week tops, given the urgency of the business, but there's no official word.

We certainly camped enough for it to be around a week. It's already been said that adding up the individual timespans doesn't equal the actual length of time, though, and that nothing can ever push us concretely into that elusive sixth year.