Define a period

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How many working days in year 1918?

Here is the detail of the calculation:

Because 1918 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 8 public holidays that do not fall during a weekend and we obtain 253 working days in 1918.

Here is the list of these 8 public holidays:

1. New Year's Day : Tuesday, 1 January, 1918
2. Good Friday : Friday, 29 March, 1918
3. Spring Day : Wednesday, 1 May, 1918
4. Midsummer Day : Monday, 24 June, 1918
5. Independence Restoration Day : Tuesday, 20 August, 1918
6. Christmas Eve : Tuesday, 24 December, 1918
7. Christmas Day : Wednesday, 25 December, 1918
8. Second Day of Christmas : Thursday, 26 December, 1918

And here are the 4 public holidays falling on a weekend:

1. Independence Day : Sunday, 24 February, 1918
2. Easter : Sunday, 31 March, 1918
3. Pentecost : Sunday, 19 May, 1918
4. Victory Day : Sunday, 23 June, 1918