How many working days in year 2033?
Here is the detail of the calculation:
Because 2033 is not a leap year, it has 365 days.
Let's remove 53 saturdays and 52 sundays. It remains 260 days.
Now, let's remove 7 public holidays that do not fall during a weekend and we obtain 253 working days in 2033.
 Here is the list of these 7 public holidays: 
 
 1. Karfreitag : пятница, 15 апрель, 2033 
2. Ostermontag : понедельник, 18 апрель, 2033 
3. Christi Himmelfahrt : четверг, 26 май, 2033 
4. Pfingstmontag : понедельник, 6 июнь, 2033 
5. Tag der Deutschen Einheit : понедельник, 3 октябрь, 2033 
6. Reformationstag : понедельник, 31 октябрь, 2033 
7. Zweiter Weihnachtsfeiertag : понедельник, 26 декабрь, 2033 
And here are the 3 public holidays falling on a weekend:
1. Neujahrstag : суббота, 1 январь, 2033 
2. Tag der Arbeit : воскресенье, 1 май, 2033 
3. Weihnachtstag : воскресенье, 25 декабрь, 2033