Define a period

...

How many working days in year 1999?

Here is the detail of the calculation:

Because 1999 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 1999.

Here is the list of these 7 public holidays:

1. Anul Nou : Friday, 1 January, 1999
2. Vinerea Mare : Friday, 9 April, 1999
3. A doua zi de Paște : Monday, 12 April, 1999
4. A doua zi de Rusalii : Monday, 31 May, 1999
5. Ziua Copilului : Tuesday, 1 June, 1999
6. Sfântul Andrei : Tuesday, 30 November, 1999
7. Ziua Națională a României : Wednesday, 1 December, 1999

And here are the 8 public holidays falling on a weekend:

1. A doua zi după Anul Nou : Saturday, 2 January, 1999
2. Ziua Unirii Principatelor Române : Sunday, 24 January, 1999
3. Paște ortodox : Sunday, 11 April, 1999
4. Ziua Muncii : Saturday, 1 May, 1999
5. Rusalii : Sunday, 30 May, 1999
6. Adormirea Maicii Domnului : Sunday, 15 August, 1999
7. Crăciunul : Saturday, 25 December, 1999
8. A doua zi de Crăciun : Sunday, 26 December, 1999