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How many working days in year 2018?
Here is the detail of the calculation:
Because 2018 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 9 public holidays that do not fall during a weekend and we obtain 252 working days in 2018.
 Here is the list of these 9 public holidays: 
 
 1. New Year's Day : Monday, 1 January, 2018 
2. Good Friday : Friday, 30 March, 2018 
3. Easter Monday : Monday, 2 April, 2018 
4. Ascension Day : Thursday, 10 May, 2018 
5. Whit Monday : Monday, 21 May, 2018 
6. Swiss National Day : Wednesday, 1 August, 2018 
7. Genevan Fast : Thursday, 6 September, 2018 
8. Christmas Day : Tuesday, 25 December, 2018 
9. New Year's Eve : Monday, 31 December, 2018