Define a period

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How many working days in year 2011?

Here is the detail of the calculation:

Because 2011 is not a leap year, it has 365 days.

Let's remove 53 saturdays and 52 sundays. It remains 260 days.

Now, let's remove 5 public holidays that do not fall during a weekend and we obtain 255 working days in 2011.

Here is the list of these 5 public holidays:

1. Goede Vrijdag : Friday, 22 April, 2011
2. Tweede Paasdag : Monday, 25 April, 2011
3. Hemelvaartsdag : Thursday, 2 June, 2011
4. Tweede Pinksterdag : Monday, 13 June, 2011
5. Tweede Kerstdag : Monday, 26 December, 2011

And here are the 5 public holidays falling on a weekend:

1. Nieuwjaar : Saturday, 1 January, 2011
2. Eerste Paasdag : Sunday, 24 April, 2011
3. Koninginnedag : Saturday, 30 April, 2011
4. Eerste Pinksterdag : Sunday, 12 June, 2011
5. Eerste Kerstdag : Sunday, 25 December, 2011