Define a period

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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 9 public holidays that do not fall during a weekend and we obtain 252 working days in 1988.

Here is the list of these 9 public holidays:

1. New Year's Day : Friday, 1 January, 1988
2. Preseren's Day : Monday, 8 February, 1988
3. Easter Monday : Monday, 4 April, 1988
4. Resistance Day : Wednesday, 27 April, 1988
5. May Day Holiday : Monday, 2 May, 1988
6. Assumption Day : Monday, 15 August, 1988
7. Reformation Day : Monday, 31 October, 1988
8. All Saints' Day : Tuesday, 1 November, 1988
9. Independence and Unity Day : Monday, 26 December, 1988

And here are the 6 public holidays falling on a weekend:

1. New Year Holiday : Saturday, 2 January, 1988
2. Easter : Sunday, 3 April, 1988
3. May Day : Sunday, 1 May, 1988
4. Whitsunday : Sunday, 22 May, 1988
5. Statehood Day : Saturday, 25 June, 1988
6. Christmas Day : Sunday, 25 December, 1988