Public holidays
1666, South Korea
| # | Date | Public holiday |
|---|---|---|
| 1 | Friday, 1 January 1666 | New Year's Day |
| 2 | Monday, 1 March 1666 | Independence Movement Day |
| 3 | Wednesday, 5 May 1666 | Children's Day |
| 4 | Sunday, 6 June 1666 | Memorial Day |
| 5 | Sunday, 15 August 1666 | Liberation Day |
| 6 | Monday, 16 August 1666 | Liberation Day |
| 7 | Sunday, 3 October 1666 | National Foundation Day |
| 8 | Monday, 4 October 1666 | National Foundation Day |
| 9 | Saturday, 9 October 1666 | Hangeul Day |
| 10 | Monday, 11 October 1666 | Hangeul Day |
| 11 | Saturday, 25 December 1666 | Christmas Day |
| 12 | Monday, 27 December 1666 | Christmas Day |