Just added to the 2018 calendar:

Steampunk Kitchener-Waterloo Picnic
facebook.com/events/1750299791731520
July 7 2018
Waterloo, Ontario
Canada

Ad Astra 2018
ad-astra.org
July 13 - 15 2018
Richmond Hill, Ontario
Canada

Steampunk Invasion: Mad Science
https://culture.mississauga.ca/event/benares-historic-house/steampunk-invasion-mad-science
July 21 2018
Mississauga, Ontario
Canada

Elmvale Sci-Fi Fantasy Street Party
facebook.com/events/1056737821144135
July 21 2018
Elmvale, Ontario
Canada

Amherstburg Uncommon Festival
http://www.amherstburg.ca/uncommon
August 3 - 5 2018
Amherstburg, Ontario
Canada