Define a period

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How many working days in year 1975?

Here is the detail of the calculation:

Because 1975 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 1975.

Here is the list of these 11 public holidays:

1. New Year's Day : Wednesday, 1 January, 1975
2. Day after New Year's Day : Thursday, 2 January, 1975
3. Auckland Day : Monday, 27 January, 1975
4. Waitangi Day : Thursday, 6 February, 1975
5. Good Friday : Friday, 28 March, 1975
6. Easter Monday : Monday, 31 March, 1975
7. Anzac Day : Friday, 25 April, 1975
8. Queen's Birthday : Monday, 2 June, 1975
9. Labour Day : Monday, 27 October, 1975
10. Christmas Day : Thursday, 25 December, 1975
11. Boxing Day : Friday, 26 December, 1975