Define a period

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How many working days in year 1951?

Here is the detail of the calculation:

Because 1951 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 10 public holidays that do not fall during a weekend and we obtain 251 working days in 1951.

Here is the list of these 10 public holidays:

1. Nieuwjaarsdag : Monday, 1 January, 1951
2. Paasmaandag : Monday, 26 March, 1951
3. Dag van de Arbeid : Tuesday, 1 May, 1951
4. Hemelvaartsdag : Thursday, 3 May, 1951
5. Pinkstermaandag : Monday, 14 May, 1951
6. Onze-Lieve-Vrouw Hemelvaart : Wednesday, 15 August, 1951
7. Allerheiligen : Thursday, 1 November, 1951
8. Koningsdag : Thursday, 15 November, 1951
9. Kerstmis : Tuesday, 25 December, 1951
10. Tweede Kerstdag : Wednesday, 26 December, 1951

And here are the 2 public holidays falling on a weekend:

1. Nationale Feestdag : Saturday, 21 July, 1951
2. Wapenstilstand : Sunday, 11 November, 1951