Define a period

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How many working days in year 2109?

Here is the detail of the calculation:

Because 2109 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 2109.

Here is the list of these 11 public holidays:

1. New Year's Day : Tuesday, 1 January, 2109
2. Australia Day Observance : Monday, 28 January, 2109
3. Canberra Day : Monday, 11 March, 2109
4. Good Friday : Friday, 19 April, 2109
5. Easter Monday : Monday, 22 April, 2109
6. Anzac Day : Thursday, 25 April, 2109
7. Reconciliation Day : Monday, 27 May, 2109
8. King's Birthday : Monday, 10 June, 2109
9. Labour Day : Monday, 7 October, 2109
10. Christmas Day : Wednesday, 25 December, 2109
11. Boxing Day : Thursday, 26 December, 2109

And here are the 3 public holidays falling on a weekend:

1. Australia Day : Saturday, 26 January, 2109
2. Easter Saturday : Saturday, 20 April, 2109
3. Easter Sunday : Sunday, 21 April, 2109