Define a period

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How many working days in year 1999?

Here is the detail of the calculation:

Because 1999 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 6 public holidays that do not fall during a weekend and we obtain 255 working days in 1999.

Here is the list of these 6 public holidays:

1. New Year's Day : Friday, 1 January, 1999
2. National Sovereignty and Children's Day : Friday, 23 April, 1999
3. Commemoration of Atatürk, Youth and Sports Day : Wednesday, 19 May, 1999
4. Victory Day : Monday, 30 August, 1999
5. Republic Day Eve : Thursday, 28 October, 1999
6. Republic Day : Friday, 29 October, 1999

And here is the public holiday falling on a weekend:

1. Labour and Solidarity Day : Saturday, 1 May, 1999