Define a period

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How many working days in year 1939?

Here is the detail of the calculation:

Because 1939 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 8 public holidays that do not fall during a weekend and we obtain 252 working days in 1939.

Here is the list of these 8 public holidays:

1. Easter Monday : Monday, 10 April, 1939
2. Labor Day : Monday, 1 May, 1939
3. Ascension Day : Thursday, 18 May, 1939
4. Pentecost Monday : Monday, 29 May, 1939
5. National Day : Friday, 21 July, 1939
6. Assumption of Mary : Tuesday, 15 August, 1939
7. All Saints' Day : Wednesday, 1 November, 1939
8. Christmas Day : Monday, 25 December, 1939

And here are the 2 public holidays falling on a weekend:

1. New Year's Day : Sunday, 1 January, 1939
2. Armistice Day : Saturday, 11 November, 1939