Define a period

...

How many working days in year 2018?

Here is the detail of the calculation:

Because 2018 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 5 public holidays that do not fall during a weekend and we obtain 256 working days in 2018.

Here is the list of these 5 public holidays:

1. New Year's Day : Monday, 1 January, 2018
2. Good Friday : Friday, 30 March, 2018
3. Labour Day : Tuesday, 1 May, 2018
4. National Day : Thursday, 9 August, 2018
5. Christmas Day : Tuesday, 25 December, 2018