Question 1

How many days does December 1917 have?

Accepted Answer

December 1917 has 31 days. It starts on Saturday and ends on Monday.

Question 2

What ISO week does December 1917 start in?

Accepted Answer

1 December 1917 falls in ISO week 48. Weeks run Monday–Sunday per ISO 8601.

Question 3

Where can I see the public holidays of Russia in December 1917?

Accepted Answer

The calendar on this page marks every national public holiday of Russia in December 1917 in red, with joint/regional days in amber.

декабрь 1917