The Gregorian Calendar: Our Modern Standard The most widely used calendar today, the Gregorian calendar, typically consists of 365 days in a common year. However, there’s a slight irregularity to account for the Earth’s precise orbital period around the Sun, which is approximately 365.25 days. To compensate for this, an extra day, known as a leap day, is added to the calendar...
How Many Days Are in a Year? A Closer Look
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