Define a period

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How many working days in year 2002?

Here is the detail of the calculation:

Because 2002 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 12 public holidays that do not fall during a weekend and we obtain 249 working days in 2002.

Here is the list of these 12 public holidays:

1. New Year's Day : Tuesday, 1 January, 2002
2. Seollal / Korean New Year Holiday : Monday, 11 February, 2002
3. Seollal / Korean New Year Holiday : Tuesday, 12 February, 2002
4. Seollal / Korean New Year Holiday : Wednesday, 13 February, 2002
5. Independence Movement Day : Friday, 1 March, 2002
6. Children's Day : Monday, 6 May, 2002
7. Memorial Day : Thursday, 6 June, 2002
8. Liberation Day : Thursday, 15 August, 2002
9. Chuseok / Midautumn Festival : Friday, 20 September, 2002
10. National Foundation Day : Thursday, 3 October, 2002
11. Hangeul Day : Wednesday, 9 October, 2002
12. Christmas Day : Wednesday, 25 December, 2002

And here are the 4 public holidays falling on a weekend:

1. Children's Day : Sunday, 5 May, 2002
2. Buddha's Birthday : Sunday, 19 May, 2002
3. Chuseok / Midautumn Festival : Saturday, 21 September, 2002
4. Chuseok / Midautumn Festival : Sunday, 22 September, 2002