Wednesday

Wednesday was a day of the week. Clara Oswald would travel with the Eleventh Doctor on Wednesdays; when Clara told him she'd see him next Wednesday, he replied that it might very well be "last Wednesday" instead. (TV: Nightmare in Silver)

Behind the scenes
Issues of Doctor Who: Battles in Time were released every second Wednesday from 20 September 2006 until 26 December, then switched to Thursday.