How well do you know when?

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.