Define a period

...

How many working days in year 1923?

Here is the detail of the calculation:

Because 1923 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 1923.

Here is the list of these 7 public holidays:

1. Uusaasta : Monday, 1 January, 1923
2. Suur Reede : Friday, 30 March, 1923
3. Kevadpüha : Tuesday, 1 May, 1923
4. Taasiseseisvumispäev : Monday, 20 August, 1923
5. Jõululaupäev : Monday, 24 December, 1923
6. Esimene jõulupüha : Tuesday, 25 December, 1923
7. Teine jõulupüha : Wednesday, 26 December, 1923

And here are the 5 public holidays falling on a weekend:

1. Iseseisvuspäev : Saturday, 24 February, 1923
2. Ülestõusmispühad : Sunday, 1 April, 1923
3. Nelipühad : Sunday, 20 May, 1923
4. Võidupüha : Saturday, 23 June, 1923
5. Jaanipäev : Sunday, 24 June, 1923