20 events from history — slide the timeline to your best guess and lock it in. Land close enough and it counts; the window tightens as you climb (Legends is within 2 years). The dates are fixed history, so it never goes stale.
Climb up: 2 right in a row bumps you up a difficulty level (1 → 2 → 3 → Legends).
Slip down: 2 wrong in a row drops you back a level.
Knocked out: 4 wrong answers in total ends your run.
Beat the clock: you have 2 minutes to date all 20 events.
Choose your clock
Group code — optional
Friends who enter the same code share a leaderboard. Leave blank to keep scores on this device.