Define a period

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How many working days in year 1964?

Here is the detail of the calculation:

Because 1964 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 1964.

Here is the list of these 7 public holidays:

1. Neijoerschdag : Wednesday, 1 January, 1964
2. Ouschterméindeg : Monday, 30 March, 1964
3. Dag vun der Aarbecht : Friday, 1 May, 1964
4. Christi Himmelfaart : Thursday, 7 May, 1964
5. Péngschtméindeg : Monday, 18 May, 1964
6. Nationalfeierdag : Tuesday, 23 June, 1964
7. Chrëschtdag : Friday, 25 December, 1964

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

1. Léiffrawëschdag : Saturday, 15 August, 1964
2. Allerhellegen : Sunday, 1 November, 1964
3. Stiefesdag : Saturday, 26 December, 1964