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 6 public holidays that do not fall during a weekend and we obtain 255 working days in 2021.

Here is the list of these 6 public holidays:

1. Nieuwjaar : Friday, 1 January, 2021
2. Goede Vrijdag : Friday, 2 April, 2021
3. Tweede Paasdag : Monday, 5 April, 2021
4. Koningsdag : Tuesday, 27 April, 2021
5. Hemelvaartsdag : Thursday, 13 May, 2021
6. Tweede Pinksterdag : Monday, 24 May, 2021

And here are the 4 public holidays falling on a weekend:

1. Eerste Paasdag : Sunday, 4 April, 2021
2. Eerste Pinksterdag : Sunday, 23 May, 2021
3. Eerste Kerstdag : Saturday, 25 December, 2021
4. Tweede Kerstdag : Sunday, 26 December, 2021