Tuesday

Tuesday was a day of the week. According to the Fourth Doctor, "Nobody does anything of importance on a Tuesday." (PROSE: The English Way of Death)

The Eleventh Doctor, similarly, listed Tuesdays in his list of "boring stuff", along with Sundays and Thursday afternoons. (TV: The Impossible Astronaut)

History
The Eleventh Doctor once arrived at a newly-formed Earth on a Tuesday "around six billion years ago." (TV: Hide)

Susan Foreman, while attending Coal Hill School in March 1963, had physical education on Tuesdays and Thursdays, and was forced to wear plimsolls. (PROSE: Time and Relative)

The Doctor, in his first incarnation, met his first human companions, Ian Chesterton and Barbara Wright, on a Tuesday in November 1963. (TV: An Unearthly Child)

The members of LINDA met at Maccateer Street on Tuesdays. (TV: Tardisode 10) Victor Kennedy took over LINDA and absorbed Bliss on a Tuesday night in March 2007. (TV: Love & Monsters)

The arrival of Chief Nagata's team on Le Verrier after it had gone silent was on a Tuesday in the 38th century. The Twelfth Doctor detected the day of the week by taste. (TV: Sleep No More)

The newly-regenerated Tenth Doctor planned to take Rose Tyler to the planet Barcelona on 6PM of a Tuesday in October 5006, his previous incarnation having told her that she would've "love[d] it" immediately prior to his regeneration. However, he cancelled this to take her back home to the Powell Estate on Christmas Eve 2006. (TV: Children in Need Special)

Cultural trends
Pancake Tuesday, as evidenced by its name, always took place on a Tuesday. (TV: The Rings of Akhaten)

Sunset Strip, a market visited frequently by gang members, was most busy on Tuesdays. (COMIC: Gangster's Paradise)

Other references
The Rolling Stones wrote a song named "Ruby Tuesday." (AUDIO: The Dark Husband)

Behind the scenes
Episodes of The Sarah Jane Adventures typically aired in the UK on Mondays and Tuesdays.