November 4, 2008: Writs returned to the Chief Election Officer.[1]
November 18, 2008: 40th Parliament first convenes.[2]
December 1, 2008: The Liberals and NDP sign agreement[3] on proposed coalition government to replace the governing Conservatives under Prime Minister Harper.[4]
December 1, 2008: The Liberals, NDP, and Bloc Québécois sign "policy accord"[5] whereby the Bloc would support a Liberal/NDP government for at least 18 months.[4]
December 4, 2008: Parliament prorogued by the Governor General during the parliamentary dispute on advice of the Prime Minister.[6]
December 8, 2008: Stéphane Dion announces his resignation as leader of the Liberal Party (after his successor is chosen)
December 10, 2008: Michael Ignatieff is chosen by the Liberal caucus as interim leader of the Liberal Party
January 26, 2009: Parliament to reconvene for second session.[6]
January 28, 2009: Michael Ignatieff announces that the Liberal Party will support the Conservative Budget.[7]
October 1, 2009: The Liberal Party proposes a no-confidence motion, which is defeated in the House when the NDP abstain from voting, causing the vote to fail.[9]
November 9, 2009: Four by-elections are held. The Conservatives gain two seats—one previously held by the BQ and one by an independent. The BQ and NDP hold one seat apiece.
December 30, 2009: Prime Minister Harper prorogues Parliament until March 3.
March 3, 2010: Parliament resumes.
April 9, 2010: Helena Guergis, resigned her post as Minister of State for Status of Women and is forced to leave the Conservative caucus and sit as an independent pending a Royal Canadian Mounted Police investigation into her conduct.
April 30, 2010: NDP MP Judy Wasylycia-Leis resigns as MP and leaves federal politics, in order to run for Mayor of Winnipeg.[10]
March 29, 2011: The consortium of broadcasters announces it will only invite leaders of the parties sitting in the House of Commons at dissolution to the leader's debate, excluding Elizabeth May.[19]
March 29, 2011: A Conservative party volunteer campaigning in Edmonton—Strathcona, Sebastien Togneri, is found to be under investigation by the Royal Canadian Mounted Police, and is removed from the campaign.[20]
April 5, 2011: The Federal Court rejects the Green Party's request for an expedited hearing, on allowing May to attend the debates, prior to the scheduled debates.[22]
April 10, 2011: The French language debate is moved from April 14 to April 13, due to a Montreal Canadiensplayoff game being scheduled for April 14.[23]
April 11, 2011: Manicouagan candidate, André Forbes, loses the support of the Liberal party.
April 12, 2011: The English language leaders' debate takes place.
April 13, 2011:
The nominations become official, with 1,587 people running in 308 ridings.
April 23, 2011: The fringe parties leaders' debate takes place.
April 22, 23, and 25, 2011: Advanced polls takes place
May 2, 2011:
Polling Day
The Conservative Party wins its first majority government, the New Democratic Party wins the most seats in its history, becoming the official opposition, and Elizabeth May becomes the first Green Party of Canada candidate elected. The Liberal Party won the fewest seats and received the smallest percentage of the popular vote in its history.
Gilles Duceppe steps down as leader and president of the Bloc Québécois.
May 3, 2011:
Michael Ignatieff announces he will be stepping down as leader of the Liberal Party.
Vivian Barbot is chosen as the interim president of the Bloc, despite losing her seat.