Define a period

...

How many working days in year 2057?

Here is the detail of the calculation:

Because 2057 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 11 public holidays that do not fall during a weekend and we obtain 250 working days in 2057.

Here is the list of these 11 public holidays:

1. Restoration Day of the Independent Czech State : Monday, 1 January, 2057
2. Good Friday : Friday, 20 April, 2057
3. Easter Monday : Monday, 23 April, 2057
4. Labour Day : Tuesday, 1 May, 2057
5. Liberation Day : Tuesday, 8 May, 2057
6. St Cyril and Methodius' Day : Thursday, 5 July, 2057
7. Jan Hus Day : Friday, 6 July, 2057
8. St Wenceslas Day : Friday, 28 September, 2057
9. Christmas Eve : Monday, 24 December, 2057
10. Christmas Day : Tuesday, 25 December, 2057
11. St. Stephen's Day : Wednesday, 26 December, 2057

And here are the 2 public holidays falling on a weekend:

1. Independence Day : Sunday, 28 October, 2057
2. Freedom and Democracy Day : Saturday, 17 November, 2057