Define a period

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How many working days in year 2004?

Here is the detail of the calculation:

Because 2004 is a leap year, it has 366 days.

Let's remove 52 saturdays and 52 sundays. It remains 262 days.

Now, let's remove 7 public holidays that do not fall during a weekend and we obtain 255 working days in 2004.

Here is the list of these 7 public holidays:

1. New Year's Day : Thursday, 1 January, 2004
2. Easter Monday : Monday, 12 April, 2004
3. Ascension Day : Thursday, 20 May, 2004
4. Pentecost Monday : Monday, 31 May, 2004
5. National Day : Wednesday, 21 July, 2004
6. All Saints' Day : Monday, 1 November, 2004
7. Armistice Day : Thursday, 11 November, 2004

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

1. Labor Day : Saturday, 1 May, 2004
2. Assumption of Mary : Sunday, 15 August, 2004
3. Christmas Day : Saturday, 25 December, 2004