Leap Day

How many days does a calendar year usually have?

• 366 days

• 365 days

• 367 days

• 364 days

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CCSS.4.MD.A.1

What makes 2024 a special year?

• It has 366 days

• It starts on a Friday

• It is a century year

• It has two February 29ths

Why do we add a leap day every four years?

• To make the calendar year longer

• To celebrate historical events

• Because it's a tradition

• To adjust for the extra six hours it takes the Earth to orbit the sun each year

What would happen if we didn't add a leap day every four years?

• The seasons would start to shift

• We would have shorter years

• February would always have 29 days

• The Earth would orbit the sun faster

How rare is being born on February 29?

• 1 in 10,000 chance

• 1 in 1,461 chance

• 1 in 1,000 chance

• 1 in 365 chance

What is the actual length of a solar year?

• 365.2422 days

• 365 days

• 365.25 days

• 364 days

What rule does the Gregorian calendar use to determine leap years?

• Years divisible by 100 don't have leap days unless they’re also divisible by 400

• Every year that starts on a Sunday

• Every year that is an even number

• Years that are divisible by 50

How do leapers usually celebrate their birthdays in non-leap years?

• They don't celebrate

• On March 1 or February 28

• Only every four years

• On March 2