Question 1

How many days does December 1989 have?

Accepted Answer

December 1989 has 31 days. It starts on Friday and ends on Sunday.

Question 2

What ISO week does December 1989 start in?

Accepted Answer

1 December 1989 falls in ISO week 48. Weeks run Monday–Sunday per ISO 8601.

Question 3

Where can I see the public holidays of Sri Lanka in December 1989?

Accepted Answer

The calendar on this page marks every national public holiday of Sri Lanka in December 1989 in red, with joint/regional days in amber.