"The Sliced-Crosswise Only-On-Tuesday World" is a science-fiction short story by Philip José Farmer, first published in 1971 in New Dimensions 1: Fourteen Original Science Fiction Stories. The story later formed the basis for Farmer's Dayworld trilogy of novels. Due to extreme overpopulation of Earth, citizens in the year 2055 are constrained to "stoners" - cylinders that suspend all atomic and subatomic activity in the body - for every day of the week, except for the one to which they are allocated. Tom Pym only experiences Tuesdays, but yearns to contact a beautiful woman, Jennie Marlowe, who awakes only on Wednesdays.