Sunday

Sunday was a day of the week.

Opinions
The Doctor's tenth incarnation claimed to never land on Sundays, calling them "boring". (TV: Silence in the Library) His eleventh incarnation listed Sundays in his list of "boring stuff", along with Tuesdays and Thursday afternoons. (TV: The Impossible Astronaut) Ace similarly expressed her dislike for the day, calling it "the one day of the week you can't even get a decent television programme". (TV: Survival) She later said Kirith was as exciting as Sunday morning's telly. (PROSE: Timewyrm: Apocalypse)

Trends
Sunday school took place on Sundays. (TV: The Evil of the Daleks, PROSE: The Eleventh Tiger)

Football games were often on Sundays. (PROSE: Head of State)

Another event that frequently took place on Sundays was referred to as "Sunday roast." (TV: The Girl in the Fireplace)

On Sundays, Mary McGinty would work in "the newsagent". (TV: Turn Left)

History
3 September 1939, the day the United Kingdom and France declared war on Nazi Germany at the start of World War II, fell on a Sunday. (PROSE: Timewyrm: Exodus) 30 June 1940, the day the Germans occupied Guernsey, was also a Sunday. (PROSE: Just War) 7 December 1941, the day Japan attacked Pearl Harbor during the Pacific War, bringing the United States into the conflict, was a Sunday as well. (PROSE: Only Connect)

The Apollo 11 mission to the Moon landed on Sunday 20 July 1969. (PROSE: Blue Moon)

On 21 December 1981, Commander Bill Pollock told Sarah Jane Smith that George Tracey usually visited his mother in Cirencester on Sundays. (TV: A Girl's Best Friend)

The Seventh Doctor and Ace visited Ealing Broadway on a Sunday afternoon in July 1990. (PROSE: Cat's Cradle: Time's Crucible)

By Christmas 2006, Mickey Smith had dinner on Sundays at 48 Bucknall House with Jackie Tyler, who talked about her absent daughter, Rose Tyler, all afternoon. (TV: The Christmas Invasion)

Other references
When the First Doctor's TARDIS arrived in London in 2167, Ian Chesterton noted it was "pretty deserted", jokingly suggesting it was a Sunday. (TV: The Dalek Invasion of Earth) The Third Doctor made a similar joke to Sarah Jane Smith when they arrived in a similarly deserted London, this time in the 1970s, saying, "Great Britain always closes on Sundays." (TV: Invasion of the Dinosaurs) Donna Noble also inquired as to whether she and the Tenth Doctor had landed on a Sunday when they realised that there was "silence in the Library". (TV: Silence in the Library)

Behind the scenes
series 11 in 2018, regular weekly Doctor Who airings on BBC One moved from Saturday evenings to a Sunday teatime slot, in an effort to reach a wider audience.