query: How long does cider take to ferment?
passage: Cider
The cider is ready to drink after a three-month fermentation period, although it is more often matured in the vats for up to three years.[33]
passage: Apple
Apples are milled or pressed to produce apple juice, which may be drunk unfiltered (called apple cider in North America), or filtered. Filtered juice is often concentrated and frozen, then reconstituted later and consumed. Apple juice can be fermented to make cider (called hard cider in North America), ciderkin, and vinegar. Through distillation, various alcoholic beverages can be produced, such as applejack, Calvados, and apfelwein.