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How many working days in year 1985?
Here is the detail of the calculation:
Because 1985 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 1985.
 Here is the list of these 8 public holidays: 
 
 1. New Year's Day : Tuesday, 1 January, 1985 
2. Good Friday : Friday, 5 April, 1985 
3. Easter Monday : Monday, 8 April, 1985 
4. May Day : Wednesday, 1 May, 1985 
5. Ascension Day : Thursday, 16 May, 1985 
6. Independence Day : Friday, 6 December, 1985 
7. Christmas Day : Wednesday, 25 December, 1985 
8. St Stephen's Day : Thursday, 26 December, 1985 
And here are the 5 public holidays falling on a weekend:
1. Epiphany : Sunday, 6 January, 1985 
2. Easter Sunday : Sunday, 7 April, 1985 
3. Whit Sunday : Sunday, 26 May, 1985 
4. Midsummer Day : Saturday, 22 June, 1985 
5. All Saints' Day : Saturday, 2 November, 1985