A pilot was produced by Yorkshire Television under the name Calendar Countdown, named after the local news bulletin.
A full series followed in 1982.
Calendar Countdown was moved to Channel 4 (still produced by Yorkshire Television) and the word Calendar was dropped from the name. It was also the first programme to be aired on Channel 4.
The analogue clock was added to the logo in 1999.
The background changed to blue in 2009.