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Tap the events in chronological order, oldest first.

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About this page & FAQ

About PlayMemorize Order by When

PlayMemorize Order by When is a free chronological ordering game. Several internationally-known historical events appear in random order; you tap them in the order they happened, oldest first. One wrong placement ends the round and reveals the true timeline.

Adjustable difficulty. Choose how many events per round (3 to 10) and how tightly clustered in time they are. Easy mode spreads events across millennia · Hard mode bunches them inside a single century, where the difference between 1879 (Edison's bulb) and 1889 (the Eiffel Tower) becomes a real test.

Streak-based scoring. Each correctly-ordered round adds to your streak; one mistake resets it. Best streak per (size, difficulty) combination is saved locally so you have something to beat.

Part of the PlayMemorize family of free brain-training games. Runs entirely in your browser, works offline as a Progressive Web App.

Frequently Asked Questions

Q: How does Order by When work?

A handful of internationally-known historical events appear in random order. Tap them in the order they happened, oldest first. After your last tap the game reveals the true years and your streak advances if you got them all right.

Q: How many events per round?

You choose - between 3 and 10. Three events is a quick warm-up; ten is a serious test of how well you actually know the timeline.

Q: How does difficulty work?

Difficulty controls how close in time the events sit. At the easy end, events span thousands of years (pyramids vs. Moon landing) and ordering is mostly common sense. At the hard end the round may pull events from the same century, where exact dates matter.

Q: Where do the events come from?

A hand-curated pool of internationally-known events from antiquity to the late twentieth century · the kind that show up in every world history syllabus. The pool is shared with the When Did and Who Did games.

Q: Is it free?

Yes, completely free. No account, no ads, no paywalls. Best streaks are saved locally in your browser.