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 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. Нова Година : Friday, 1 January, 1988
2. Божић : Thursday, 7 January, 1988
3. Дан државности Србије : Monday, 15 February, 1988
4. Дан после Дана државности Србије : Tuesday, 16 February, 1988
5. Велики петак : Friday, 8 April, 1988
6. Васкршњи понедељак : Monday, 11 April, 1988
7. Празник после Празника рада : Monday, 2 May, 1988
8. Дан примирја : Friday, 11 November, 1988

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

1. Празник после Нове Године : Saturday, 2 January, 1988
2. Васкршња субота : Saturday, 9 April, 1988
3. Васкрс : Sunday, 10 April, 1988
4. Празник рада : Sunday, 1 May, 1988