Define a period

...

How many working days in year 2067?

Here is the detail of the calculation:

Because 2067 is not a leap year, it has 365 days.

Let's remove 53 saturdays and 52 sundays. It remains 260 days.

Now, let's remove 11 public holidays that do not fall during a weekend and we obtain 249 working days in 2067.

Here is the list of these 11 public holidays:

1. New Year's Day Observance : Monday, 3 January, 2067
2. Day after New Year's Day Observance : Tuesday, 4 January, 2067
3. Auckland Day : Monday, 31 January, 2067
4. Waitangi Day Observance : Monday, 7 February, 2067
5. Good Friday : Friday, 1 April, 2067
6. Easter Monday : Monday, 4 April, 2067
7. Anzac Day : Monday, 25 April, 2067
8. Queen's Birthday : Monday, 6 June, 2067
9. Labour Day : Monday, 24 October, 2067
10. Boxing Day : Monday, 26 December, 2067
11. Christmas Day Observance : Tuesday, 27 December, 2067

And here are the 4 public holidays falling on a weekend:

1. New Year's Day : Saturday, 1 January, 2067
2. Day after New Year's Day : Sunday, 2 January, 2067
3. Waitangi Day : Sunday, 6 February, 2067
4. Christmas Day : Sunday, 25 December, 2067