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Every four years, February gets one extra day.

Every four years, February gets one extra day.

That special year is called a leap year, and February grows to 29 days. It happens to keep our calendar lined up with the sun.

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There are 12 months in one year. There are 12 months in one year. January is the first month and December is the last. January is the first month and December is the last. Most months have 30 or 31 days. Most months have 30 or 31 days. February is the shortest month, with only 28 days most years. February is the shortest month, with only 28 days most years. In Vietnamese, months are counted with numbers. In Vietnamese, months are counted with numbers.