On September 11, Canada’s government announced a parliamentary election for Monday, October 21. Candidates qualify for the ballot by submitting 100 signatures and paying a filing fee of $1,000, which is returned if the candidate polls a certain share of the vote. The deadline for the petition and the filing fee is September 30.
Contrast that schedule with U.S. elections, in which new parties in a few states must qualify for the ballot almost a full year before the election. Also there are states in which candidates must file a declaration of candidacy as much as eleven months before the election.
UPDATE: here is an article about the Green Party and its hopes to elect at least four members of the House of Commons.