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 4 public holidays that do not fall during a weekend and we obtain 256 working days in 2011.

Here is the list of these 4 public holidays:

1. Good Friday : Friday, 22 April, 2011
2. Labour Day : Monday, 2 May, 2011
3. National Day : Tuesday, 9 August, 2011
4. Christmas Day : Monday, 26 December, 2011

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

1. New Year's Day : Saturday, 1 January, 2011
2. Labour Day : Sunday, 1 May, 2011
3. Christmas Day : Sunday, 25 December, 2011