Define a period

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How many working days in year 2015?

Here is the detail of the calculation:

Because 2015 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 2015.

Here is the list of these 11 public holidays:

1. New Year's Day : Thursday, 1 January, 2015
2. Day after New Year's Day : Friday, 2 January, 2015
3. Auckland Day : Monday, 26 January, 2015
4. Waitangi Day : Friday, 6 February, 2015
5. Good Friday : Friday, 3 April, 2015
6. Easter Monday : Monday, 6 April, 2015
7. Anzac Day Observance : Monday, 27 April, 2015
8. Queen's Birthday : Monday, 1 June, 2015
9. Labour Day : Monday, 26 October, 2015
10. Christmas Day : Friday, 25 December, 2015
11. Boxing Day Observance : Monday, 28 December, 2015

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

1. Anzac Day : Saturday, 25 April, 2015
2. Boxing Day : Saturday, 26 December, 2015