Question 1

How many days does April 1980 have?

Accepted Answer

April 1980 has 30 days. It starts on Tuesday and ends on Wednesday.

Question 2

What ISO week does April 1980 start in?

Accepted Answer

1 April 1980 falls in ISO week 14. Weeks run Monday–Sunday per ISO 8601.

Question 3

Where can I see the public holidays of Singapore in April 1980?

Accepted Answer

The calendar on this page marks every national public holiday of Singapore in April 1980 in red, with joint/regional days in amber.