A timeline game for curious minds How well do you know when?
Place moments from dinosaurs, history, science, technology, culture and everyday life on one continuous timeline.
No account required. Progress is stored in your browser.
One continuous story
Deep time, recent memory, and everything between.
QuoAnno is a timeline guessing game built to sharpen your sense of when. Each round gives you an event from a broad mix of natural history, ancient and modern history, science, technology, space, art, film, music, the internet, exploration, archaeology, and sport. Place it on the timeline, reveal the accepted date, and see how close you came.
The same scale stretches from Earth’s deep past to the present day. Player-facing dates use BC and AD — AD means Anno Domini — while approximate events keep honest uncertainty ranges instead of pretending to know an exact year. Keep going in Endless, choose one of four hidden-date timeline points in Four Points, play the shared Daily Mix, or choose categories for a social game; your solo progress stays saved in this browser.
Read · place · reveal
How a round works
- 01
Read the event
You get the event and enough context to place it, but never its date.
- 02
Find the era
Click, zoom and move along one continuous timeline, from deep time to today, until you reach the right stretch.
- 03
Lock your guess
Land inside the accepted range for a full 1000 points; outside it, the score falls away smoothly with distance.
- 04
Read the reveal
The accepted date appears with its context, so you see how far you missed and in which direction.
Ten moments · every day
The same timeline for everyone.
Daily Mix gives every player one fixed set of ten events, changing at midnight UTC. Finish your official attempt, keep a local streak, then compare your score without revealing the answers.
Play today's Daily →Across the timeline
Explore moments
Choose your perspective
Browse categories
Ancient & Medieval
Empires, rulers, battles and turning points before the modern age.Modern History
Revolutions, wars, politics and social change in the modern era.Natural World
Life, evolution, extinctions and the changing planet.Science
Discoveries and experiments that changed how we understand reality.Technology
Machines, computing, transport and inventions.Space
Astronomy, spaceflight and cosmic milestones.Art & Culture
Artworks, books, architecture and cultural milestones.Film & Television
Cinema, television and screen culture.Music
Composers, recordings, bands and landmark releases.Internet & Gaming
The web, creators, platforms and video games.Exploration
Journeys, expeditions and encounters across the world.Sports
Competitions, records and sporting institutions.Archaeology
Ancient sites, discoveries and the human past revealed.
Before you play
Read the guides
What is a timeline game?
The formats a timeline game can take, what separates a good one from a quiz with dates in it, and how to start playing.History games and the chronology problem
Why dates are the part of history that refuses to stick, what a history game fixes, and what it honestly cannot.How to guess the year of almost anything
Anchors, bracketing and the visual tells that turn a blind guess into an estimate landing inside a decade.BC and AD explained
What the two labels mean, why there is no year zero, where the system came from, and how BCE and CE relate to it.Deep time, and why a timeline cannot be linear
All of written history is a rounding error on the age of the Earth. What that does to a timeline, and how to navigate one anyway.How we know when things happened
Documents, radiocarbon, tree rings and ice cores — where a date actually comes from, and why some of them are honest ranges.
Ready when you are
