Define a period

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How many working days in year 2017?

Here is the detail of the calculation:

Because 2017 is not a leap year, it has 365 days.

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

Now, let's remove 9 public holidays that do not fall during a weekend and we obtain 251 working days in 2017.

Here is the list of these 9 public holidays:

1. Ouschterméindeg : Monday, 17 April, 2017
2. Dag vun der Aarbecht : Monday, 1 May, 2017
3. Christi Himmelfaart : Thursday, 25 May, 2017
4. Péngschtméindeg : Monday, 5 June, 2017
5. Nationalfeierdag : Friday, 23 June, 2017
6. Léiffrawëschdag : Tuesday, 15 August, 2017
7. Allerhellegen : Wednesday, 1 November, 2017
8. Chrëschtdag : Monday, 25 December, 2017
9. Stiefesdag : Tuesday, 26 December, 2017

And here is the public holiday falling on a weekend:

1. Neijoerschdag : Sunday, 1 January, 2017