Define a period

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How many working days in year 2020?

Here is the detail of the calculation:

Because 2020 is a leap year, it has 366 days.

Let's remove 52 saturdays and 52 sundays. It remains 262 days.

Now, let's remove 11 public holidays that do not fall during a weekend and we obtain 251 working days in 2020.

Here is the list of these 11 public holidays:

1. New Year's Day : Wednesday, 1 January, 2020
2. Australia Day Observance : Monday, 27 January, 2020
3. Canberra Day : Monday, 9 March, 2020
4. Good Friday : Friday, 10 April, 2020
5. Easter Monday : Monday, 13 April, 2020
6. Anzac Day observance : Monday, 27 April, 2020
7. Reconciliation Day : Monday, 1 June, 2020
8. King's Birthday : Monday, 8 June, 2020
9. Labour Day : Monday, 5 October, 2020
10. Christmas Day : Friday, 25 December, 2020
11. Boxing Day Observance : Monday, 28 December, 2020

And here are the 5 public holidays falling on a weekend:

1. Australia Day : Sunday, 26 January, 2020
2. Easter Saturday : Saturday, 11 April, 2020
3. Easter Sunday : Sunday, 12 April, 2020
4. Anzac Day : Saturday, 25 April, 2020
5. Boxing Day : Saturday, 26 December, 2020