Define a period

...

How many working days in year 1959?

Here is the detail of the calculation:

Because 1959 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 7 public holidays that do not fall during a weekend and we obtain 254 working days in 1959.

Here is the list of these 7 public holidays:

1. New Year's Day : Thursday, 1 January, 1959
2. Easter Monday : Monday, 30 March, 1959
3. Labour Day : Friday, 1 May, 1959
4. Ascension Day : Thursday, 7 May, 1959
5. Whit Monday : Monday, 18 May, 1959
6. National Day : Tuesday, 23 June, 1959
7. Christmas Day : Friday, 25 December, 1959

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

1. Assumption of Mary : Saturday, 15 August, 1959
2. All Saints' Day : Sunday, 1 November, 1959
3. St. Stephen's Day : Saturday, 26 December, 1959