Season Six, also known as Day 6, of the television series 24 premiered on Sunday, January 14 2007. It premiered on Sky One in the UK on January 21 2007, showing 2 episodes per week for the first three weeks of broadcast, then switching to one episode per week. The show therefore only reached episode 9 before the Sky channels were taken off Virgin Media. The Australian premiere was on January 30 2007.

The season's storyline began and ended at 6:00 a.m. It is set 20 months after the events of the fifth season.

A 10-minute prequel was available with the fifth season DVD.