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 6 public holidays that do not fall during a weekend and we obtain 255 working days in 2009.
 Here is the list of these 6 public holidays: 
 
 1. Jour de l'An : четверг, 1 январь, 2009 
2. Saint-Joseph : четверг, 19 март, 2009 
3. Jeudi de l'Ascension : четверг, 21 май, 2009 
4. Fête-Dieu : четверг, 11 июнь, 2009 
5. Immaculée Conception : вторник, 8 декабрь, 2009 
6. Noël : пятница, 25 декабрь, 2009 
And here are the 3 public holidays falling on a weekend:
1. Fête nationale suisse : суббота, 1 август, 2009 
2. Assomption : суббота, 15 август, 2009 
3. Toussaint : воскресенье, 1 ноябрь, 2009