Wacaday was a children's television series in the United Kingdom that ran in TV-am's school-holidays slot from 1985 until 1992, in an 8:50-9:25 a.m. slot, and was hosted by Timmy Mallett.
Wacaday was introduced when Roland Rat, the puppet host of TV-am's previous weekday morning slot during school holidays, had transferred to the BBC. With only a week until the new show was due to start, it was decided to produce a spin-off of the existing and successful Saturday morning programme, Wide Awake Club. Timmy Mallett, the best-known presenter of Wide Awake Club, was chosen to front the new show. The "wac" of the title took the initials of Wide Awake Club.