How many working days in year 1980?
Here is the detail of the calculation:
Because 1980 is a leap year, it has 366 days.
Let's remove 52 saturdays and 52 sundays. It remains 262 days.
Now, let's remove 13 public holidays that do not fall during a weekend and we obtain 249 working days in 1980.
Here is the list of these 13 public holidays:
1. New Year's Day : Tuesday, 1 January, 1980
2. Seollal / Korean New Year Holiday : Friday, 15 February, 1980
3. Independence Movement Day : Monday, 3 March, 1980
4. Children's Day : Monday, 5 May, 1980
5. Buddha's Birthday : Wednesday, 21 May, 1980
6. Memorial Day : Friday, 6 June, 1980
7. Liberation Day : Friday, 15 August, 1980
8. Chuseok / Midautumn Festival : Monday, 22 September, 1980
9. Chuseok / Midautumn Festival : Tuesday, 23 September, 1980
10. Chuseok / Midautumn Festival : Wednesday, 24 September, 1980
11. National Foundation Day : Friday, 3 October, 1980
12. Hangeul Day : Thursday, 9 October, 1980
13. Christmas Day : Thursday, 25 December, 1980
And here are the 3 public holidays falling on a weekend:
1. Seollal / Korean New Year Holiday : Saturday, 16 February, 1980
2. Seollal / Korean New Year Holiday : Sunday, 17 February, 1980
3. Independence Movement Day : Saturday, 1 March, 1980