Calendar Math
What day is it in 100 days? Is 1900 a leap year?
About Calendar Math
Calendar puzzles: work out days of the week, days in months and leap years. Trickier than it sounds. Includes leap-year rules for century years, which catch out almost everyone.
How to play Calendar Math
- Answer each calendar question.
- Choose a mode: Classic (10 timed questions), Speed run (60 seconds), Survival (three lives) or Daily (the same questions for everyone today).
- Tap an answer or press 1–4. Faster correct answers score more, and three in a row adds a streak bonus.
- Review every answer at the end, and share your daily result without spoilers.
Calendar Math FAQ
Is there a daily Calendar Math challenge?
Yes. Daily mode gives everyone the same questions each day, resetting at your local midnight, with a shareable result grid.
Is Calendar Math free to play?
Yes. Calendar Math is free in your browser on OFF PLAY, with nothing to download or install.
Find more math & educational games, browse all free games or check the leaderboards.
Games like Calendar Math
SoloNewTime Calculation
Read clocks and work out arrival times.
SoloNewUnit Conversion Quiz
km to m, kg to g, hours to minutes.
SoloNewGuess the Year
When did YouTube launch? When did India win its first World Cup?
SoloNewMental Math Race
Sums, percentages and number bonds in a 60-second race.
SoloNewArithmetic Sprint
Four operations, rising difficulty, eight seconds each.
SoloNewTimes Tables Challenge
Times tables to 12 × 12, then beyond, against the clock.
SoloNewFraction Match
Equivalent fractions, simplifying and fractions of amounts.
SoloNewPrime Number Hunt
Spot the prime among numbers that look like primes.