Define a period

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How many working days in year 1985?

Here is the detail of the calculation:

Because 1985 is not a leap year, it has 365 days.

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

Now, let's remove 9 public holidays that do not fall during a weekend and we obtain 252 working days in 1985.

Here is the list of these 9 public holidays:

1. New Year's Day : Tuesday, 1 January, 1985
2. Easter Monday : Monday, 8 April, 1985
3. Labor Day : Wednesday, 1 May, 1985
4. Ascension Day : Thursday, 16 May, 1985
5. Pentecost Monday : Monday, 27 May, 1985
6. Assumption of Mary : Thursday, 15 August, 1985
7. All Saints' Day : Friday, 1 November, 1985
8. Armistice Day : Monday, 11 November, 1985
9. Christmas Day : Wednesday, 25 December, 1985

And here is the public holiday falling on a weekend:

1. National Day : Sunday, 21 July, 1985