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How many working days in year 2111?
Here is the detail of the calculation:
Because 2111 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 2111.
 Here is the list of these 8 public holidays: 
 
 1. New Year's Day : Thursday, 1 January, 2111 
2. Berchtold's Day : Friday, 2 January, 2111 
3. Good Friday : Friday, 27 March, 2111 
4. Easter Monday : Monday, 30 March, 2111 
5. Labour Day : Friday, 1 May, 2111 
6. Ascension Day : Thursday, 7 May, 2111 
7. Whit Monday : Monday, 18 May, 2111 
8. Christmas Day : Friday, 25 December, 2111 
And here are the 2 public holidays falling on a weekend:
1. Swiss National Day : Saturday, 1 August, 2111 
2. Saint Stephen's Day : Saturday, 26 December, 2111