Define a period

...

How many working days in year 1961?

Here is the detail of the calculation:

Because 1961 is not a leap year, it has 365 days.

Let's remove 52 saturdays and 53 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 1961.

Here is the list of these 11 public holidays:

1. Day after New Year's Day : Monday, 2 January, 1961
2. New Year's Day Observance : Tuesday, 3 January, 1961
3. Auckland Day : Monday, 30 January, 1961
4. Waitangi Day : Monday, 6 February, 1961
5. Good Friday : Friday, 31 March, 1961
6. Easter Monday : Monday, 3 April, 1961
7. Anzac Day : Tuesday, 25 April, 1961
8. Queen's Birthday : Monday, 5 June, 1961
9. Labour Day : Monday, 23 October, 1961
10. Christmas Day : Monday, 25 December, 1961
11. Boxing Day : Tuesday, 26 December, 1961

And here is the public holiday falling on a weekend:

1. New Year's Day : Sunday, 1 January, 1961