Question: What day and month did the countries declare war on Germany?
About the article "Invasion of Poland", section "Abstract".

Candidate passages:
Bolivia was one of many Latin American countries to declare war on Germany later on in the war, joining the Allies on 7 April 1943.
It was the only country to declare war in 1943.
Shortly after war was declared, the President of Bolivia, Enrique Peñaranda, was overthrown in a coup.
The new ruler, Gualberto Villarroel, had fascist and anti-Semitic leanings, but foreign pressure compelled him to remain at war and to suppress his more extreme pro-Nazi supporters.
Bolivian mines supplied needed tin to the Allies , but with no coastline, the landlocked country did not send troops or warplanes overseas. 
Historiographical Viewpoints.
Contemporary View.
Especially directly after World War II, Nazi Germany was held to blame for starting the war.
Historians cited several reasons for this.
Germany was the one who initially invaded Poland against the recommendation of the allies, and also attacked the Soviet Union.
Also, the system of alliances between the Axis Powers was one that was only meant for war.
The tripartite pact stated that if any country declared war on one of the Axis countries, the other two would also declare war on those countries.
Another reason, historians saw, is that the policies of Hitler were overly aggressive; not only did Hitler preach war with France and the Soviet Union, but he followed a careful pre-made plan of expansionism. 
World War II.
Nazi Germany.
After Nazi Germany invaded Poland on September 1, 1939, the United Kingdom and France declared war on September 3.
To assert Canada's independence from the UK, as already established by the Statute of Westminster 1931, Canada's political leaders decided to unnecessarily seek the approval of the federal parliament to declare war.
Parliament was not scheduled to return until October 2, but returned to session early on September 7 to consider the declaration of war.
The Senate approved a declaration of war on September 8 and the House of Commons approved it on September 9.
The following day, Prime Minister Mackenzie King and the Cabinet drafted an Order in Council to that effect.
Canadian diplomats brought the document to King George VI, at the Royal Lodge, Windsor Great Park, for his signature, whereupon Canada had officially declared war on Nazi Germany.
In his capacity as the government's official recorder for the war effort, Leonard Brockington noted: "King George VI of England did not ask us to declare war for him—we asked King George VI of Canada to declare war for us."
France was one of the original guarantors of Polish security and as such was one of the first countries to declare war on Germany.
In 1940, following the Battle of France, the French government signed an armistice with Germany, leading to the foundation of Vichy France and Free French Forces in exile.
The leader of the Free French, Charles de Gaulle, took control of France in 1944 and the country ended the war as an ally. 
At the beginning of the game, Germany must declare war on Poland.
France and the British Commonwealth must subsequently declare war on Germany on their next move.
At this time, Japan is at war with China.
All other Major Powers are neutral.
Future declarations of war between the Major Powers influences US Entry and US Tension, which are abstractions of when United States of America can declare war.
Briefly, aggressive and successful play from the Axis side will hasten the entry of the US into the war.
Aggressive Allied play - like declaration of war on neutral minor countries - will slow US entry.
However, these required political actions can be quite different if you play with Days of Decision, which can be used as an expansion of this game.
Days of Decision starts gameplay in 1936 and allows for a far greater range of actions in the political spectrum.