Define a period

...

How many working days in year 1955?

Here is the detail of the calculation:

Because 1955 is not a leap year, it has 365 days.

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

Now, let's remove 7 public holidays that do not fall during a weekend and we obtain 253 working days in 1955.

Here is the list of these 7 public holidays:

1. Ouschterméindeg : Monday, 11 April, 1955
2. Christi Himmelfaart : Thursday, 19 May, 1955
3. Péngschtméindeg : Monday, 30 May, 1955
4. Nationalfeierdag : Thursday, 23 June, 1955
5. Léiffrawëschdag : Monday, 15 August, 1955
6. Allerhellegen : Tuesday, 1 November, 1955
7. Stiefesdag : Monday, 26 December, 1955

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

1. Neijoerschdag : Saturday, 1 January, 1955
2. Dag vun der Aarbecht : Sunday, 1 May, 1955
3. Chrëschtdag : Sunday, 25 December, 1955