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How many working days in year 2097?
Here is the detail of the calculation:
Because 2097 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 10 public holidays that do not fall during a weekend and we obtain 251 working days in 2097.
 Here is the list of these 10 public holidays: 
 
 1. Restoration Day of the Independent Czech State : Tuesday, 1 January, 2097 
2. Good Friday : Friday, 29 March, 2097 
3. Easter Monday : Monday, 1 April, 2097 
4. Labour Day : Wednesday, 1 May, 2097 
5. Liberation Day : Wednesday, 8 May, 2097 
6. St Cyril and Methodius' Day : Friday, 5 July, 2097 
7. Independence Day : Monday, 28 October, 2097 
8. Christmas Eve : Tuesday, 24 December, 2097 
9. Christmas Day : Wednesday, 25 December, 2097 
10. St. Stephen's Day : Thursday, 26 December, 2097 
And here are the 3 public holidays falling on a weekend:
1. Jan Hus Day : Saturday, 6 July, 2097 
2. St Wenceslas Day : Saturday, 28 September, 2097 
3. Freedom and Democracy Day : Sunday, 17 November, 2097