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 7 public holidays that do not fall during a weekend and we obtain 254 working days in 1988.

Here is the list of these 7 public holidays:

1. Uudenvuodenpäivä : Friday, 1 January, 1988
2. Loppiainen : Wednesday, 6 January, 1988
3. Pitkäperjantai : Friday, 1 April, 1988
4. 2. pääsiäispäivä : Monday, 4 April, 1988
5. Helatorstai : Thursday, 12 May, 1988
6. Itsenäisyyspäivä : Tuesday, 6 December, 1988
7. Tapaninpäivä : Monday, 26 December, 1988

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

1. Pääsiäispäivä : Sunday, 3 April, 1988
2. Vappu : Sunday, 1 May, 1988
3. Helluntaipäivä : Sunday, 22 May, 1988
4. Juhannuspäivä : Saturday, 25 June, 1988
5. Pyhäinpäivä : Saturday, 5 November, 1988
6. Joulupäivä : Sunday, 25 December, 1988