Here are the biggest albums of all time that were released each day in October. And when it comes to album covers, there are definitely quite a few bands that may have leaned into the whole creepy/spooky vibe of the season. The covers from two of Slayer's most notable albums looked right at home when they were first released in October. READ MORE: The Best Albums Released Each Day in September HistoryOctober has also traditionally been a month when major rock and metal acts released some of their biggest albums. Here is a day-by-day look at the all-time best albums released in October.