Define a period

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How many working days in year 2021?

Here is the detail of the calculation:

Because 2021 is not a leap year, it has 365 days.

Let's remove 52 saturdays and 52 sundays. It remains 261 days.

Now, let's remove 12 public holidays that do not fall during a weekend and we obtain 249 working days in 2021.

Here is the list of these 12 public holidays:

1. New Year's Day : friday, january 1, 2021
2. Martin Luther King Day : monday, january 18, 2021
3. President's Day : monday, february 15, 2021
4. Confederate Memorial Day : monday, april 26, 2021
5. Memorial Day : monday, may 31, 2021
6. Juneteenth Observance : friday, june 18, 2021
7. Independence Day Observance : monday, july 5, 2021
8. Labor Day : monday, september 6, 2021
9. Veterans Day : thursday, november 11, 2021
10. Thanksgiving : thursday, november 25, 2021
11. Christmas Observance : friday, december 24, 2021
12. New Year's Day Observance : friday, december 31, 2021

And here are the 3 public holidays falling on a weekend:

1. Juneteenth : saturday, june 19, 2021
2. Independence Day : sunday, july 4, 2021
3. Christmas : saturday, december 25, 2021