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How many working days in year 1988?
Here is the detail of the calculation:
Because 1988 is a leap year, it has 366 days.
Let's remove 53 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 1988.
 Here is the list of these 8 public holidays: 
 
 1. New Year's Day : Friday, 1 January, 1988 
2. Maundy Thursday : Thursday, 31 March, 1988 
3. Good Friday : Friday, 1 April, 1988 
4. Easter Monday : Monday, 4 April, 1988 
5. General Prayer Day : Friday, 29 April, 1988 
6. Ascension Day : Thursday, 12 May, 1988 
7. Whit Monday : Monday, 23 May, 1988 
8. Boxing Day : Monday, 26 December, 1988 
And here are the 3 public holidays falling on a weekend:
1. Easter Sunday : Sunday, 3 April, 1988 
2. Pentecost : Sunday, 22 May, 1988 
3. Christmas Day : Sunday, 25 December, 1988