Define a period

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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 10 public holidays that do not fall during a weekend and we obtain 251 working days in 2012.

Here is the list of these 10 public holidays:

1. National Day : Thursday, 15 March, 2012
2. Good Friday : Friday, 6 April, 2012
3. Easter Monday : Monday, 9 April, 2012
4. Labour Day : Tuesday, 1 May, 2012
5. Pentecost Monday : Monday, 28 May, 2012
6. State Foundation Day : Monday, 20 August, 2012
7. National Day : Tuesday, 23 October, 2012
8. All Saints' Day : Thursday, 1 November, 2012
9. Christmas Day : Tuesday, 25 December, 2012
10. Second Day of Christmas : 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. Easter Sunday : Sunday, 8 April, 2012
3. Pentecost Sunday : Sunday, 27 May, 2012