User blog comment:PlantyThePottedPlant/Random Topic Blogging III: Blog Harder/@comment-3473686-20141027212148/@comment-1647442-20141028010313

but to answer the initial question

november is a popular month for releasing things because of the holiday rush

it grows their sales during that all-important last quarter, as opposed to releasing it earlier is instead more likely to have sales spread out over time.