Question 1

How many days does September 1981 have?

Accepted Answer

September 1981 has 30 days. It starts on Tuesday and ends on Wednesday.

Question 2

What ISO week does September 1981 start in?

Accepted Answer

1 September 1981 falls in ISO week 36. Weeks run Monday–Sunday per ISO 8601.

Question 3

Where can I see the public holidays of Japan in September 1981?

Accepted Answer

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

9月 1981