This is the 78th and final day of one of the longest federal election campaigns in Canadian history.

The leaders of the main parties are racing across the country in one final push to pick up support.

Conservative Leader Stephen Harper started his day in Newmarket, just north of Toronto. His next stop of the morning was to be in Mississauga for a photo-op. Both are in the 905 belt that was so crucial to his victory in the 2011 election.

Harper heads to Regina for a campaign event early in the afternoon. That will be followed by a stop in Abbotsford, B.C.

Liberal Leader Justin Trudeau will attend rallies in Edmonton, Calgary — both Conservative strongholds where the Liberals are hoping to capture some urban Alberta seats held by the Tories. Trudeau will also stop in Vancouver.

NDP Leader Tom Mulcair will visit Toronto where the New Democrats are seen in a dogfight with the Liberals in several ridings. He heads to Montreal this evening for a final campaign rally.

Green Party Leader Elizabeth May will campaign today in the Victoria-area, while Bloc Québécois Leader Gilles Duceppe closes out his campaign with events in Trois-Rivières, Sherbrooke, Saint-Jean-Sur-Richelieu and Montreal.

It appears 11 weeks of campaigning has not led to waning voter interest. Elections Canada says it's making plans to deal with a larger than normal turnout on Monday.

About 3.6 million people cast ballots in advance polls last weekend, a 71-per-cent increase from 2011. The agency says additional staff can be brought in to count ballots. Or, if extra help is not available, the vote count can start before the polls close. In that case, no one will be able to enter or leave the room until the counting session ends.

The party leaders are making last-ditch appeals on social media.

Take no vote for granted. Knock on doors. Make phone calls. If you want <a href="https://twitter.com/hashtag/RealChange?src=hash">#RealChange</a>, keep working hard for it! <a href="https://t.co/DlfsQ9WKd4">https://t.co/DlfsQ9WKd4</a> —@JustinTrudeau

Merci, Vancouver. Now is our opportunity to think big & to dare to accomplish great things together. On continue.—TM <a href="http://t.co/U36XXEdv0i">pic.twitter.com/U36XXEdv0i</a> —@ThomasMulcair

CBC News Network begins Monday's live coverage, led by chief correspondent Peter Mansbridge, at 6:30 p.m. ET. CBCNews.ca will make results available in real time.