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 10 public holidays that do not fall during a weekend and we obtain 251 working days in 1988.

Here is the list of these 10 public holidays:

1. Πρωτοχρονιά : Friday, 1 January, 1988
2. Θεοφάνεια : Wednesday, 6 January, 1988
3. Καθαρά Δευτέρα : Monday, 22 February, 1988
4. Εικοστή Πέμπτη Μαρτίου : Friday, 25 March, 1988
5. Μεγάλη Παρασκευή : Friday, 8 April, 1988
6. Δευτέρα του Πάσχα : Monday, 11 April, 1988
7. Δευτέρα Πεντηκοστής : Monday, 30 May, 1988
8. Κοίμηση της Θεοτόκου : Monday, 15 August, 1988
9. Ημέρα του Όχι : Friday, 28 October, 1988
10. Σύναξη της Θεοτόκου : Monday, 26 December, 1988

And here are the 4 public holidays falling on a weekend:

1. Ορθόδοξο Πάσχα : Sunday, 10 April, 1988
2. Εργατική Πρωτομαγιά : Sunday, 1 May, 1988
3. Πεντηκοστή : Sunday, 29 May, 1988
4. Χριστούγεννα : Sunday, 25 December, 1988