i dunno exactly but let me share a story...
Last October I harvested my AK-47 and White Widow, dried them for 5 days, cured them in glass mason jars for two weeks, then just left them under my bed as I had to travel.
What I thought would be a 2-week trip ending up being 4 months away from my bud. Naturally, my biggest concern was that I'd return home to a few jours of mould.
To my surprise, I opened the jars which were left under my bed for 4 months and the buds were even better than when I had left them.
So, as long as they're in an air-tight (preferably glass) container, in a cool and dark place, they should be fine.