noun
a leap year
adjective
relating to a leap year, especially one with 366 days
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The year 2020 was a bissextile year, also known as a leap year.
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Hey, did you know 2020 is a bissextile year? That means we get an extra day in February!
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2026 is gonna be a bissextile year, so we get an extra day to party!
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Just like a bissextile year, sometimes we need an extra day to catch up on things in life.