Define a period

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How many working days in year 1982?

Here is the detail of the calculation:

Because 1982 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 1982.

Here is the list of these 7 public holidays:

1. Første nyttårsdag : Friday, 1 January, 1982
2. Skjærtorsdag : Thursday, 8 April, 1982
3. Langfredag : Friday, 9 April, 1982
4. Andre påskedag : Monday, 12 April, 1982
5. Grunnlovsdagen : Monday, 17 May, 1982
6. Kristi Himmelfartsdag : Thursday, 20 May, 1982
7. Andre pinsedag : Monday, 31 May, 1982

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

1. Første påskedag : Sunday, 11 April, 1982
2. Første mai : Saturday, 1 May, 1982
3. Første pinsedag : Sunday, 30 May, 1982
4. Første Juledag : Saturday, 25 December, 1982
5. Andre Juledag : Sunday, 26 December, 1982