Question 1

How many days does December 1999 have?

Accepted Answer

December 1999 has 31 days. It starts on Wednesday and ends on Friday.

Question 2

What ISO week does December 1999 start in?

Accepted Answer

1 December 1999 falls in ISO week 48. Weeks run Monday–Sunday per ISO 8601.

Question 3

Where can I see the public holidays of South Korea in December 1999?

Accepted Answer

The calendar on this page marks every national public holiday of South Korea in December 1999 in red, with joint/regional days in amber.

12월 1999