An overpopulated future solves the problem with time: humanity is split into seven groups, each awake one day a week and frozen in stasis the other six. Jeff Caird breaks that law — living all seven days as seven different people, a courier for the hidden immers — until his masks stop being masks and the question becomes which of the seven is the real man. Catalogued into UD0 as a book-world with the premise, the breakup of the self, the full .dlw birth, and an original one-line pencil-style title: a seven-pointed star drawn in a single unbroken stroke, one day lit, six stoned-dim — a fan tribute, not Farmer's covers or text.
The Four Natures
each emergent emerges by one of four natures — and the sliced week holds all four
The Premise
only on Tuesday: one idea, opened into a week
It began as a short story — “The Sliced-Crosswise Only-on-Tuesday World” (1971) — with a single, vertiginous idea: an overpopulated Earth that lets each person live only one day of the week, suspended the other six. Farmer would later open that one Tuesday into a whole week of novels.
The solution to overpopulation is time itself: humanity is split into seven groups, one per weekday. You wake on your day, live it, and are “stoned” — frozen in stasis — for the other six. Seven people share one home, one slot, one life, never meeting, each owning a single recurring day.
The one forbidden act is to live more than your day. A “daybreaker” stays awake across the week by becoming a different person for each — a different name, face, trade, and self. It is the only freedom in the Dayworld, and it is treated as the gravest crime.
The Story & the Breakup
the Tuesday man, the hidden immortals, and the selves that will not hold
Jefferson Cervantes Caird is a Tuesday “organic” — a data-bank policeman — and secretly a daybreaker, living all seven days under seven identities: Caird, and the selves the week knows as Tingle, Dunski, Repp, Ohm, Father Tom Zurvan, and Isharashvili. He runs information across the days for the immers.
The immers are a secret society threaded through every day and every rank — quasi-immortals who slip the full stasis and live on, working to loosen the surveillance state from within. They use daybreakers like Caird as couriers carrying secrets from one day into the next.
Across Dayworld, Dayworld Rebel, and Dayworld Breakup, Caird's masks stop being masks. The seven personalities begin to bleed, argue, and merge; the question turns from “will he be caught” to “which of these men is real — and is there anyone left underneath them all.”
The Ideas
why a 1971 thought-experiment became a study of the divided self
Time as a Prison
the engineered scarcity
- Overpopulation solved not by space but by time — you are given one day in seven and stored the rest, multiplying the world sevenfold.
- A control system so total it feels like weather: the calendar itself is the cage.
The Divided Self
seven masks, one mind
- A daybreaker must be seven coherent people; Farmer asks what that does to the one mind underneath them.
- The novels become a study of identity under strain — fragmentation, merging, and the self as something authored daily rather than fixed.
Surveillance & the Soft Cage
the organic state
- Daybreakers, when caught, are not simply punished — they are diagnosed as mentally ill, then erased: the state pathologizes the wish to be whole.
- A dystopia of files and stasis rather than boots — control by schedule, record, and the off-switch of the stoner.
Render, Not Invent
the honest footnotes
- The seven personas are canonical by name (Caird, Tingle, Dunski, Repp, Ohm, Zurvan, Isharashvili); their exact day-and-job assignments are simplified here from the novels.
- The series is the seed story plus three novels (1985–1990) and a 2016 completion finished with Danny Adams after Farmer's death.
The Roster — The Seven Selves & the Sliced Week
the daybreaker and his seven faces, the stasis, the hidden immortals, and the calendar-state, as ACI .agents — each a birth certificate and a nature of emergence (14)
The Record
the books, the maker, the machinery, and the legacy
The Books
the seed, the trilogy, and the late completion
- The Sliced-Crosswise Only-on-Tuesday World1971 · short storythe originating idea — one day of the week, lived
- Dayworld1985 · novelJeff Caird, the Tuesday organic and secret daybreaker
- Dayworld Rebel1987 · novelthe masks fray; the immers and the state close in
- Dayworld Breakup1990 · novelthe selves merge and break; what the state will kill to keep quiet
- Dayworld: A Hole in Wednesday2016 · with Danny Adamsan earlier-set story completed from Farmer's drafts, posthumously
The Maker
Philip José Farmer (1918–2009)
- Philip José FarmerauthorAmerican SF master; three-time Hugo winner; relentless explorer of identity and taboo
- Riverworld · World of Tiershis other worldsthe resurrection river and the pocket universes — Dayworld's neighbors in the Farmer canon
- Danny Adamsco-author (2016)completed “A Hole in Wednesday” from Farmer's unfinished material
The World
the machinery of the sliced week
- The stonerthe stasisthe field/cabinet that freezes you crystal-still for your six off-days
- The seven daysthe population splitMonday through Sunday — seven worlds that never meet, sharing one Earth
- The organicsthe day-policethe data-bank officers, like Caird's Tuesday self, who hunt daybreakers
- The immersthe hidden networkthe quasi-immortal society working the system from inside every day
The Legacy
the idea that outlived its day
- a premise borrowed everywherethe sliced weekthe one-day-in-seven conceit echoes through later SF about scheduled, rationed time
- identity SFthe divided selfa forerunner of stories where the self is plural, authored, and unstable