Define a period

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How many working days in year 1997?

Here is the detail of the calculation:

Because 1997 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 11 public holidays that do not fall during a weekend and we obtain 250 working days in 1997.

Here is the list of these 11 public holidays:

1. Anul Nou : Wednesday, 1 January, 1997
2. A doua zi după Anul Nou : Thursday, 2 January, 1997
3. Ziua Unirii Principatelor Române : Friday, 24 January, 1997
4. Vinerea Mare : Friday, 25 April, 1997
5. A doua zi de Paște : Monday, 28 April, 1997
6. Ziua Muncii : Thursday, 1 May, 1997
7. A doua zi de Rusalii : Monday, 16 June, 1997
8. Adormirea Maicii Domnului : Friday, 15 August, 1997
9. Ziua Națională a României : Monday, 1 December, 1997
10. Crăciunul : Thursday, 25 December, 1997
11. A doua zi de Crăciun : Friday, 26 December, 1997

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

1. Paște ortodox : Sunday, 27 April, 1997
2. Ziua Copilului : Sunday, 1 June, 1997
3. Rusalii : Sunday, 15 June, 1997
4. Sfântul Andrei : Sunday, 30 November, 1997