Define a period

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How many working days in year 2004?

Here is the detail of the calculation:

Because 2004 is a leap year, it has 366 days.

Let's remove 52 saturdays and 52 sundays. It remains 262 days.

Now, let's remove 7 public holidays that do not fall during a weekend and we obtain 255 working days in 2004.

Here is the list of these 7 public holidays:

1. Første nyttårsdag : Thursday, 1 January, 2004
2. Skjærtorsdag : Thursday, 8 April, 2004
3. Langfredag : Friday, 9 April, 2004
4. Andre påskedag : Monday, 12 April, 2004
5. Grunnlovsdagen : Monday, 17 May, 2004
6. Kristi Himmelfartsdag : Thursday, 20 May, 2004
7. Andre pinsedag : Monday, 31 May, 2004

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

1. Første påskedag : Sunday, 11 April, 2004
2. Første mai : Saturday, 1 May, 2004
3. Første pinsedag : Sunday, 30 May, 2004
4. Første Juledag : Saturday, 25 December, 2004
5. Andre Juledag : Sunday, 26 December, 2004