Seriously? You cannot think of anything that would reasonably mean spending seven weeks doing absolutely nothing productive isn't an option?
Magical events tied to the phase of the moon, the tides
Upcoming military attack the players are aware of and need to do something about
Disease, curse, or other malady that needs to be cured sooner rather than later
Ongoing political turmoil that could explode at any moment unless addressed
Resurrecting a party member or ally
Completing a job on time, so the party actually gets paid
Keeping a promise to someone important
Chasing down an enemy fleeing overland
Reaching a destination before the competition/Forces of Evil
Recruiting as many allies as possible as quickly as possible to deal with a looming threat
Like... I've been playing in a LMoP/Phandelver and Below game and there's been all of one time we had more than two days where we weren't doing anything particularly important. I'm sitting on a pile of cash fit for a wyrmling (something like 5k-6k gp equivalent, some in pp or ep, and that's not counting the gems and other "sell this for gp" loot), having had little to nothing to spend it on because we can't waste the several days it would take to go to Neverwinter.
It really, truly isn't that hard to make "literally almost two months" not actually a viable option. Heck, I can count on one hand the number of games I've played in where a continuous, uninterrupted span of 50 days was even remotely plausible, let alone something we actually did (which would be zero, I have never once played any game where the party thought that was a remotely good or even acceptable idea.)