Define a period

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How many working days in year 2004?

Here is the detail of the calculation:

Because 2004 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 2004.

Here is the list of these 7 public holidays:

1. Nieuwjaarsdag : Thursday, 1 January, 2004
2. Paasmaandag : Monday, 12 April, 2004
3. Hemelvaartsdag : Thursday, 20 May, 2004
4. Pinkstermaandag : Monday, 31 May, 2004
5. Nationale Feestdag : Wednesday, 21 July, 2004
6. Allerheiligen : Monday, 1 November, 2004
7. Wapenstilstand : Thursday, 11 November, 2004

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

1. Dag van de Arbeid : Saturday, 1 May, 2004
2. Onze-Lieve-Vrouw Hemelvaart : Sunday, 15 August, 2004
3. Kerstmis : Saturday, 25 December, 2004