Define a period

...

How many working days in year 1984?

Here is the detail of the calculation:

Because 1984 is a leap year, it has 366 days.

Let's remove 52 saturdays and 53 sundays. It remains 261 days.

Now, let's remove 10 public holidays that do not fall during a weekend and we obtain 251 working days in 1984.

Here is the list of these 10 public holidays:

1. National Day : Thursday, 15 March, 1984
2. Good Friday : Friday, 20 April, 1984
3. Easter Monday : Monday, 23 April, 1984
4. Labour Day : Tuesday, 1 May, 1984
5. Pentecost Monday : Monday, 11 June, 1984
6. State Foundation Day : Monday, 20 August, 1984
7. National Day : Tuesday, 23 October, 1984
8. All Saints' Day : Thursday, 1 November, 1984
9. Christmas Day : Tuesday, 25 December, 1984
10. Second Day of Christmas : Wednesday, 26 December, 1984

And here are the 3 public holidays falling on a weekend:

1. New Year's Day : Sunday, 1 January, 1984
2. Easter Sunday : Sunday, 22 April, 1984
3. Pentecost Sunday : Sunday, 10 June, 1984