Trailer Park Boys: Countdown to Liquor Day is a 2009 Canadian mockumentary black comedy crime film directed by Mike Clattenburg, and based on the Canadian television series Trailer Park Boys. It is the second film in the Trailer Park Boys franchise, following Trailer Park Boys: The Movie (2006). Trailer Park Boys: Countdown to Liquor Day is a conclusion to "Say Goodnight to the Bad Guys", the television special that ended the series after its seventh season. The film follows the characters of Ricky, Julian and Bubbles as they return to a life of crime after being released from prison.

Trailer Park Boys is a Canadian mockumentary television sitcom created by Mike Clattenburg that began airing in 2001 as a continuation of his 1999 film bearing the same name. The show follows the misadventures of a group of trailer park residents, including two lead characters in and out of prison, living in the fictional "Sunnyvale Trailer Park" in Dartmouth, Nova Scotia. The series premiered on Showcase on April 20, 2001, and originally ran for seven seasons before concluding with a one-hour special on December 7, 2008. The series spawned three films: The Movie, released on October 6, 2006; Countdown to Liquor Day, released on September 25, 2009; and Don't Legalize It, released on April 18, 2014.