Define a period

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How many working days in year 2011?

Here is the detail of the calculation:

Because 2011 is not a leap year, it has 365 days.

Let's remove 53 saturdays and 52 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 2011.

Here is the list of these 11 public holidays:

1. New Year's Day Observance : Monday, 3 January, 2011
2. Australia Day : Wednesday, 26 January, 2011
3. Canberra Day : Monday, 14 March, 2011
4. Good Friday : Friday, 22 April, 2011
5. Easter Monday : Monday, 25 April, 2011
6. Additional public holiday because Anzac day falling on week end : Tuesday, 26 April, 2011
7. King's Birthday : Monday, 13 June, 2011
8. Labour Day : Monday, 3 October, 2011
9. Family & Community Day : Monday, 10 October, 2011
10. Christmas Day Observance : Monday, 26 December, 2011
11. Boxing Day Observance : Tuesday, 27 December, 2011

And here are the 4 public holidays falling on a weekend:

1. New Year's Day : Saturday, 1 January, 2011
2. Easter Saturday : Saturday, 23 April, 2011
3. Easter Sunday : Sunday, 24 April, 2011
4. Christmas Day : Sunday, 25 December, 2011