In the Gregorian Calendar, a common year has 365 days. Every four years there is a leap year, where the month of February has one extra day, and thus on a Leap Year, there are 366 days

The time period of a Day is determined by the time it takes the Earth to completely rotate on its axis, and are measured through the time it takes the Sun to reach its highest point in the sky, twice consecutively. 

The Earth takes 12 months to complete one turn around the Sun. These months correspond to a whole year and are divided into units of 28, 30, or 31 days. So, one solar year is actually 365.25 days long, or 365 days, 5 hours, 48 minutes and 46 seconds. 

Leap years happen every four years and add one extra day to the calendar to make up for those extra 5 hours, 48 minutes and 46 seconds. These hours are rounded up to 6 hours because 6 times 4 is 24. The 24 corresponds to the hours that make up a whole day. This extra day is added to February, which has 29 days during a leap year. 

Is 2021 a Leap Year?

No, 2021 is a common year. The next leap year will be in 2024. 

How many days in the year 2021?

As it is a common year, the 2021 calendar has 365 days. In the United States, there are 261 working days, 104 weekend days, and 10 federal holidays

Different states may observe their own State Holidays throughout the year, so those will be a day off for their population as well. Check locally. 

Month Working Days Federal Holidays Weekends
January 20 2 5
February 19 1 4
March 23 - 4
April 22 - 4
May 21 1 5
June 22 - 4
July 22 1 5
August 22 - 5
September 22 1 4
October 21 1 5
November 22 2 4
December 23 1 4

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