By Lorenzo Geano · Updated on November 2, 2026 · 5 min read
A date on its own is hard to remember, because it attaches to nothing: 1789 says little as long as you do not know what happened that year. Yet history rests on dates that must be placed correctly. This article proposes a four-step method: fix a few landmarks, tell events as a story rather than list them, place each date in its century, then practise ordering events and testing yourself. The examples come from the mini-courses and games of Mnemoz.
Why do isolated dates get forgotten?
A bare number gives memory nothing to hold onto. Remembering 1914 without knowing what happened amounts to memorising a string of digits, with no anchor to find it again when needed. The problem therefore lies less in the number of dates than in their isolation: a date is more easily linked to an event, its causes and its effects.
Starting with a few landmarks
Rather than learning a long list of dates at random, it is better to first fix a few landmarks that structure the rest. On Mnemoz, the eras are delimited as follows: Antiquity ends in 476, the Middle Ages in 1492 and the early modern period in 1789. A date is then placed before or after these limits. For the 20th century, two other landmarks are useful: 1914-1918 and 1939-1945, the dates of the two world wars. A date between 1492 and 1789 therefore belongs to the early modern period, and a date after 1789 to the modern period.
Telling events as a story rather than listing them
An event is better remembered when you know its story: what prepared it, what happened, and what followed from it. Each mini-course follows this plan, with a timeline and a quiz. The date then becomes the endpoint of a narrative, rather than an isolated piece of data.
The causes: what prepared the event.
The course of events: what happened, and in what order.
The consequences: what followed from it.
On Mnemoz, the 77 history mini-courses follow this structure. Read one, then close it and tell the three parts out loud before checking. This restatement is a small recall test: it forces you to retrieve the sequence instead of rereading it.
The timeline and the century: a simple rule
A timeline places events relative to one another, which helps you see what comes before and after. To place a date in its century, the rule is as follows: for a year that does not end in 00, the century is made up of the first two digits, plus one. So 1789 falls in the 18th century, because 17 plus 1 gives 18.
This rule lets you classify a date without knowing it by heart. To practise, take three dates at random, say which century each belongs to, then check. A year such as 1914 falls in the 20th century under the same rule. The century gives a first landmark for placing an event in its era.
Practising putting events in order
Putting events in order requires you to retrieve the dates and the gaps between them, which asks more than simple reading. The Put in order game offers five rounds of five wars to arrange from oldest to most recent. You choose the era: Antiquity, Middle Ages, early modern period or modern period. A mistake is a clue: it shows which date to revisit, provided you then check the right answer.
Testing yourself in this way is in line with the technique rated as having high utility by Dunlosky et al. (2013). To go further on this point, read the article on the testing effect.
Testing yourself and spacing out revision
The quizzes on the site are sorted by theme and by difficulty, and each answer is followed by an explanation. Spreading study over time improves retention compared with studying everything in a single block (Cepeda et al., 2006). Revisiting a date a few days apart, rather than all in the same evening, goes in this direction.
No. It is better to fix a few landmarks and understand how events follow one another, then add dates around those landmarks. A date learned without context has no anchor for memory. For the dates that remain, spaced repetition helps keep them in memory.
How do I tell the centuries apart?
For a year that does not end in 00, the century is the first two digits, plus one: 1789 falls in the 18th century and 1914 in the 20th. To practise, take a few dates at random, give their century, then check. Years ending in 00 are not covered by this rule: they close their century, and 1900 is for example the last year of the 19th century.
Where should I start with the wars?
Start with the two landmarks 1914-1918 and 1939-1945, which frame the two world wars. Then read one mini-course following the plan causes, course of events, consequences. Next, test yourself with the Put in order game, to place the events in their order.
Dunlosky, J., Rawson, K. A., Marsh, E. J., Nathan, M. J., & Willingham, D. T. (2013). Improving students' learning with effective learning techniques: Promising directions from cognitive and educational psychology. Psychological Science in the Public Interest, 14(1), 4-58. DOI
Cepeda, N. J., Pashler, H., Vul, E., Wixted, J. T., & Rohrer, D. (2006). Distributed practice in verbal recall tasks: A review and quantitative synthesis. Psychological Bulletin, 132(3), 354-380. DOI
Studies are summarised simply. Sample schedules and routines are common rules of thumb, not research findings.