Define a period

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How many working days in year 2009?

Here is the detail of the calculation:

Because 2009 is not a leap year, it has 365 days.

Let's remove 52 saturdays and 52 sundays. It remains 261 days.

Now, let's remove 8 public holidays that do not fall during a weekend and we obtain 253 working days in 2009.

Here is the list of these 8 public holidays:

1. New Year's Day : Thursday, 1 January, 2009
2. Maundy Thursday : Thursday, 9 April, 2009
3. Good Friday : Friday, 10 April, 2009
4. Easter Monday : Monday, 13 April, 2009
5. Labour Day : Friday, 1 May, 2009
6. Ascension Day : Thursday, 21 May, 2009
7. Whit Monday : Monday, 1 June, 2009
8. Christmas Day : Friday, 25 December, 2009

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

1. Easter Sunday : Sunday, 12 April, 2009
2. Constitution Day : Sunday, 17 May, 2009
3. Pentecost : Sunday, 31 May, 2009
4. St Stephen's Day : Saturday, 26 December, 2009