How to Learn the Days in Each Month
Some months have 31 days, some 30, and February is the odd one out. Two classic tricks — a rhyme and a knuckle count — mean you never have to guess again. This deck teaches both, plus the day count for every month.
There are 14 cards in the deck below. You can read through them, practise them right here with the flip-card player, and then save the deck to study properly with spaced repetition — the method that makes them stick for months, not minutes.
Why the number of days in each month is hard to memorize (and the fix)
The 30/31 pattern is not regular, so it must be memorized or worked out with a trick. February's leap-year twist adds one more thing to remember.
The fix is active recall plus spaced repetition. Instead of re-reading the list (which feels productive but barely works), you test yourself — pull each answer out of memory — and you review each card on a schedule that stretches over time. Every time you successfully recall a fact, the memory gets stronger and the next review is pushed further out. That's how you go from "I saw it once" to "I just know it."
The fastest way to learn the number of days in each month
- Break it into small batches. Learn the rhyme first (it covers the 30-day months), then everything else has 31, except February.
- Test, don't re-read. Look at the question, say the answer out loud before flipping the card. The little struggle to recall is what builds the memory — a smooth re-read does almost nothing.
- Review on a schedule. Spaced repetition shows you each card right before you'd forget it. Get one right and it comes back in a few days, then a week, then a month. Miss one and it comes back sooner.
- Keep sessions short and daily. Five to ten minutes a day beats a two-hour cram every time. Consistency is the whole game.
One fact per card. Knuckle trick: count across your knuckles and dips — knuckles are 31-day months, the dips between them are 30 (or 28) days.
The full deck: the Days in Each Month
Here's every card in the set. Practise them above, or save the deck and let spaced repetition schedule your reviews automatically.
| Month | Days |
|---|---|
| How many days in January? | 31 |
| How many days in February? | 28 (29 in a leap year) |
| How many days in March? | 31 |
| How many days in April? | 30 |
| How many days in May? | 31 |
| How many days in June? | 30 |
| How many days in July? | 31 |
| How many days in August? | 31 |
| How many days in September? | 30 |
| How many days in October? | 31 |
| How many days in November? | 30 |
| How many days in December? | 31 |
| Which months have 30 days? | April, June, September, and November |
| When does February have 29 days? | In a leap year (every 4 years, with century-year exceptions) |
Save this deck and actually remember it
Create a free account, keep this 14-card deck, and we'll schedule every review at the perfect moment. First deck free forever — no credit card.
Study this deck free →FAQ: learning the number of days in each month
How long does it take to learn the number of days in each month?
Most people can lock in the number of days in each month within one to three weeks of short daily sessions. With spaced repetition doing 10–14 cards a day, you'll recognise them within days and recall them reliably within a couple of weeks.
What's the best way to memorize the number of days in each month?
Active recall plus spaced repetition. Test yourself instead of re-reading, and review on a schedule that spaces the cards out over time. Flashcards are built for exactly this — which is why the deck above is the fastest path.
Is this deck free?
Yes. You can practise all 14 cards on this page for free with no account. Sign up (also free) to save the deck and let spaced repetition schedule your reviews so it sticks long-term.