Question 1

How many days does January 1981 have?

Accepted Answer

January 1981 has 31 days. It starts on Thursday and ends on Saturday.

Question 2

What ISO week does January 1981 start in?

Accepted Answer

1 January 1981 falls in ISO week 1. Weeks run Monday–Sunday per ISO 8601.

Question 3

Where can I see the public holidays of South Korea in January 1981?

Accepted Answer

The calendar on this page marks every national public holiday of South Korea in January 1981 in red, with joint/regional days in amber.

1월 1981