Question 1

How many days does April 1991 have?

Accepted Answer

April 1991 has 30 days. It starts on Monday and ends on Tuesday.

Question 2

What ISO week does April 1991 start in?

Accepted Answer

1 April 1991 falls in ISO week 14. Weeks run Monday–Sunday per ISO 8601.

Question 3

Where can I see the public holidays of Japan in April 1991?

Accepted Answer

The calendar on this page marks every national public holiday of Japan in April 1991 in red, with joint/regional days in amber.

4月 1991