Permanent historical records · Updated 2026-11-03

1939 in Canada

Explore 3 historical events and records for Canada in 1939.

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Historical records for Canada in 1939

Sorted by month and day. Records with no month are shown last. Showing 3 of 3 unique records.

3Unique records

1 of 1Page

2Named events on this page

3Named people on this page

2Places on this page

September

10 September 1939

Declaration of War

Aberhart, William · Prime Minister of Canada · Warfare / World War, 2nd

Canada declares war on Germany

10 September 1939

Declaration of War

King, William Lyon Mackenzie · Ottawa · Prime Minister of Canada · Government / Government of Canada

Canada declares war on Germany after parliamentary approval.

Other events (month unknown)

1939

Oppenheimer-Volkoff Neutron-Star Limit

Volkoff, George · Berkeley · Physicist · Science / Astrophysics

With Oppenheimer, calculates equilibrium limits for dense neutron cores using general relativity.

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How these records were prepared

Generated from the World History Database historical_events table. Identical display records are collapsed; descriptions otherwise retain the stored text. Coverage and source quality vary. Check primary and specialist sources before citing individual historical claims.