13 Days of Halloween
1998–2001 (Fox Family Channel/Fox Family)
13 Nights of Halloween
2002-2014 (ABC Family) 2012-2015 (ABC Spark)
2015-2017 (ABC Family/Freeform) 2016-2017 (ABC Spark)
31 Nights of Halloween
2018-present (Freeform & ABC Spark)
During its May upfront in 2018, Freeform announced that its annual 13 Nights of Halloween block has been extended to run throughout the entire month of October, and renamed "31 Nights of Halloween".