Define a period

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How many working days in year 1992?

Here is the detail of the calculation:

Because 1992 is a leap year, it has 366 days.

Let's remove 52 saturdays and 52 sundays. It remains 262 days.

Now, let's remove 7 public holidays that do not fall during a weekend and we obtain 255 working days in 1992.

Here is the list of these 7 public holidays:

1. Nieuwjaar : Wednesday, 1 January, 1992
2. Goede Vrijdag : Friday, 17 April, 1992
3. Tweede Paasdag : Monday, 20 April, 1992
4. Koninginnedag : Thursday, 30 April, 1992
5. Hemelvaartsdag : Thursday, 28 May, 1992
6. Tweede Pinksterdag : Monday, 8 June, 1992
7. Eerste Kerstdag : Friday, 25 December, 1992

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

1. Eerste Paasdag : Sunday, 19 April, 1992
2. Eerste Pinksterdag : Sunday, 7 June, 1992
3. Tweede Kerstdag : Saturday, 26 December, 1992