Answered already (1 year, plus extensions). Just adding, my understanding is that it's the *storage* of your household goods that drives the time limit, not the move itself. If you need to go beyond your time limit but are willing to foot the bill for the storage, I believe the move itself is still covered.

Definitely research this for yourself before you press-to-test, I didn't do it this way myself so I'm only relaying my (possibly flawed) understanding of the rules....