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📅 Free Calendar Worksheet with Answers

Leap Years, Days in Each Month, Weeks, Centuries and Dates

Free Calendar and Dates Worksheet

Clocks are only half of time. This worksheet covers the calendar half: how many days sit in each month, why February changes length, how leap years actually work, how many weeks fit into a year, and what a decade, a century and a millennium mean. There is a leap year checker you can type any year into, a colour-coded month chart, and fourteen questions with hints and answers. The leap year rule catches out adults as often as children, because it is not simply "every four years": century years like 1900 are skipped unless they divide by 400, which is why 2000 was a leap year but 1900 was not. No login. No subscription. Completely free.

Leap YearsDays in Each MonthWeeks in a Year Centuries and DecadesReading a CalendarAge Calculation Class 2 to 7FreeNo Login14 Questions

Key Calendar Facts

365 days = 1 normal year
366 days = 1 leap year
52 weeks + 1 day = 1 year
12 months = 1 year
10 years = 1 decade
100 years = 1 century
1000 years = 1 millennium
February = 28 or 29 days

🥚 Leap Year Checker

Type any year and find out whether it is a leap year, with the full working shown step by step.

Enter a year above and press Check.

📆 Days in Each Month

Blue months have 31 days, orange months have 30 days, and February is the odd one out.

January31 days
February28 or 29
March31 days
April30 days
May31 days
June30 days
July31 days
August31 days
September30 days
October31 days
November30 days
December31 days

The knuckle trick: make a fist and count across your knuckles and the dips between them, starting with January on the first knuckle. Every month that lands on a raised knuckle has 31 days. Every month that lands in a dip has 30 days, except February.

📄 Printable PDF with Answer Key
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Frequently Asked Questions about the Calendar

January 31, February 28 (29 in a leap year), March 31, April 30, May 31, June 30, July 31, August 31, September 30, October 31, November 30, December 31.
February has 28 days in a normal year and 29 days in a leap year.
A leap year has 366 days, with an extra day added to the end of February. The rule has three steps: if the year divides exactly by 4 it is a leap year; but if it also divides by 100 it is not; unless it also divides by 400, in which case it is. That is why 2000 was a leap year but 1900 was not.
The Earth takes about 365 and a quarter days to travel once around the Sun, not exactly 365. Those spare quarter-days add up to roughly one full day every four years, so an extra day is added to keep the calendar lined up with the seasons.
There are 52 full weeks in a year plus one extra day, because 52 x 7 = 364. In a leap year there are two extra days.
A decade is 10 years, a century is 100 years and a millennium is 1000 years.
April, June, September and November each have 30 days. Everything else has 31, apart from February.
Make a fist. Start at the knuckle of your index finger and say January, then the dip beside it is February, the next knuckle is March, and carry on. Months landing on a raised knuckle have 31 days; months landing in a dip have 30 days (February excepted). When you run out of knuckles at July, start again from the first knuckle with August.