Define a period

...

How many working days in year 2109?

Here is the detail of the calculation:

Because 2109 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 2109.

Here is the list of these 10 public holidays:

1. Neijoerschdag : Tuesday, 1 January, 2109
2. Ouschterméindeg : Monday, 22 April, 2109
3. Dag vun der Aarbecht : Wednesday, 1 May, 2109
4. Europadag : Thursday, 9 May, 2109
5. Christi Himmelfaart : Thursday, 30 May, 2109
6. Péngschtméindeg : Monday, 10 June, 2109
7. Léiffrawëschdag : Thursday, 15 August, 2109
8. Allerhellegen : Friday, 1 November, 2109
9. Chrëschtdag : Wednesday, 25 December, 2109
10. Stiefesdag : Thursday, 26 December, 2109

And here is the public holiday falling on a weekend:

1. Nationalfeierdag : Sunday, 23 June, 2109