Restaurant Day is international; it started in Finland. They had milder winter weather than we did for the February one this year...
The worldwide website is restaurantday.org
I typed in Montréal QC to get to the local map and indications:
Moldova Day in Laval looks interesting.
I'll try to get something in Villeray - Petite-Patrie or Mile End but I'm quite busy this weekend. Some of the pop-ups may be cancelled if the weather is too foul.