Question 1

How many days does December 1981 have?

Accepted Answer

December 1981 has 31 days. It starts on Tuesday and ends on Thursday.

Question 2

What ISO week does December 1981 start in?

Accepted Answer

1 December 1981 falls in ISO week 49. Weeks run Monday–Sunday per ISO 8601.

Question 3

Where can I see the public holidays of Hong Kong in December 1981?

Accepted Answer

The calendar on this page marks every national public holiday of Hong Kong in December 1981 in red, with joint/regional days in amber.

12月 1981