Define a period

...

How many working days in year 2012?

Here is the detail of the calculation:

Because 2012 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 2012.

Here is the list of these 11 public holidays:

1. New Year's Day observance : Monday, 2 January, 2012
2. Human Rights Day : Wednesday, 21 March, 2012
3. Good Friday : Friday, 6 April, 2012
4. Family Day : Monday, 9 April, 2012
5. Freedom Day : Friday, 27 April, 2012
6. Workers' Day : Tuesday, 1 May, 2012
7. National Women's Day : Thursday, 9 August, 2012
8. Heritage Day : Monday, 24 September, 2012
9. Day of Reconciliation observance : Monday, 17 December, 2012
10. Christmas Day : Tuesday, 25 December, 2012
11. Day of Goodwill : Wednesday, 26 December, 2012

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

1. New Year's Day : Sunday, 1 January, 2012
2. Youth Day : Saturday, 16 June, 2012
3. Day of Reconciliation : Sunday, 16 December, 2012