Question 1

How many days does January 1975 have?

Accepted Answer

January 1975 has 31 days. It starts on Wednesday and ends on Friday.

Question 2

What ISO week does January 1975 start in?

Accepted Answer

1 January 1975 falls in ISO week 1. Weeks run Monday–Sunday per ISO 8601.

Question 3

Where can I see the public holidays of Singapore in January 1975?

Accepted Answer

The calendar on this page marks every national public holiday of Singapore in January 1975 in red, with joint/regional days in amber.