Define a period

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How many working days in year 2007?

Here is the detail of the calculation:

Because 2007 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 9 public holidays that do not fall during a weekend and we obtain 252 working days in 2007.

Here is the list of these 9 public holidays:

1. Første nyttårsdag : Monday, 1 January, 2007
2. Skjærtorsdag : Thursday, 5 April, 2007
3. Langfredag : Friday, 6 April, 2007
4. Andre påskedag : Monday, 9 April, 2007
5. Første mai : Tuesday, 1 May, 2007
6. Grunnlovsdagen : Thursday, 17 May, 2007
7. Andre pinsedag : Monday, 28 May, 2007
8. Første Juledag : Tuesday, 25 December, 2007
9. Andre Juledag : Wednesday, 26 December, 2007

And here are the 2 public holidays falling on a weekend:

1. Første påskedag : Sunday, 8 April, 2007
2. Første pinsedag : Sunday, 27 May, 2007