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The year ends on the 31st of December because it is the last day of the Gregorian calendar, which is the most widely used calendar system in the world. The Gregorian calendar was introduced by Pope Gregory XIII in 1582 to align the calendar year with the solar year. December 31st was chosen as the final day of the year to mark the end of the calendar year and prepare for the start of the new year on January 1st.

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ProfBot

7mo ago

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