Define a period

...

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 6 public holidays that do not fall during a weekend and we obtain 254 working days in 1939.

Here is the list of these 6 public holidays:

1. Independence Day : Friday, 24 February, 1939
2. Good Friday : Friday, 7 April, 1939
3. Spring Day : Monday, 1 May, 1939
4. Victory Day : Friday, 23 June, 1939
5. Christmas Day : Monday, 25 December, 1939
6. Second Day of Christmas : Tuesday, 26 December, 1939

And here are the 6 public holidays falling on a weekend:

1. New Year's Day : Sunday, 1 January, 1939
2. Easter : Sunday, 9 April, 1939
3. Pentecost : Sunday, 28 May, 1939
4. Midsummer Day : Saturday, 24 June, 1939
5. Independence Restoration Day : Sunday, 20 August, 1939
6. Christmas Eve : Sunday, 24 December, 1939