定义一个时期

...

How many working days in year 2020?

Here is the detail of the calculation:

Because 2020 is a leap year, it has 366 days.

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

Now, let's remove 11 public holidays that do not fall during a weekend and we obtain 251 working days in 2020.

Here is the list of these 11 public holidays:

1. Jour de l'An : 星期三, 2020, 01, 1
2. Jour de la Sainte Dévote : 星期一, 2020, 01, 27
3. Lundi de Pâques : 星期一, 2020, 04, 13
4. Fête du Travail : 星期五, 2020, 05, 1
5. Jeudi de l'Ascension : 星期四, 2020, 05, 21
6. Lundi de la Pentecôte : 星期一, 2020, 06, 1
7. Jour de la fête Dieu : 星期四, 2020, 06, 11
8. Fête de la Toussaint : 星期一, 2020, 11, 2
9. Fête Nationale : 星期四, 2020, 11, 19
10. Fête de l'Immaculée Conception : 星期二, 2020, 12, 8
11. Jour de Noël : 星期五, 2020, 12, 25

And here are the 2 public holidays falling on a weekend:

1. Fête de l'Assomption : 星期六, 2020, 08, 15
2. Fête de la Toussaint : 星期日, 2020, 11, 1