Define a period

...

How many working days in year 1928?

Here is the detail of the calculation:

Because 1928 is a leap year, it has 366 days.

Let's remove 52 saturdays and 53 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 1928.

Here is the list of these 11 public holidays:

1. Day after New Year's Day : Monday, 2 January, 1928
2. New Year's Day Observance : Tuesday, 3 January, 1928
3. Auckland Day : Monday, 30 January, 1928
4. Waitangi Day : Monday, 6 February, 1928
5. Good Friday : Friday, 6 April, 1928
6. Easter Monday : Monday, 9 April, 1928
7. Anzac Day : Wednesday, 25 April, 1928
8. Queen's Birthday : Monday, 4 June, 1928
9. Labour Day : Monday, 22 October, 1928
10. Christmas Day : Tuesday, 25 December, 1928
11. Boxing Day : Wednesday, 26 December, 1928

And here is the public holiday falling on a weekend:

1. New Year's Day : Sunday, 1 January, 1928