St. Jean Baptiste Day, or the Fête Nationale holiday, is on Sunday, but there will be disruptions to your normal routine the day after, on Monday, which many people will have off.
Here's a non-exhaustive sample of what will be operating normally over the next couple days, and what won't.
• Malls, most retail stores, and large grocery stores will be closed Sunday, though some smaller stores may remain open. They should reopen on Monday.
• SAQ outlets will be closed Sunday, and open Monday — though there will be no SAQ.com deliveries made on Monday.
• Banks will be closed both days.
• Most major pharmacies should be open both days.
• Depanneurs and smaller grocery stores can remain open, and there's an excellent chance most of them are.
• Public markets, such as the Atwater, Bonsecours and Jean-Talon Markets, will be open both days.
• Restaurants can remain open at their discretion — though some are usually closed on Sundays or Mondays. Call ahead, if you're unsure.
• Most federal, provincial and municipal government offices and service counters
• The Montreal municipal courthouse will be closed Monday.
• Post offices will be closed on Monday, and there won't be any mail pickup or delivery.
• If your garbage pickup day is Monday, it should go ahead in every Montreal borough. Outside Montreal, check with your city or town.
• Openings for arenas, swimming pools, sports facilities and libraries will vary, depending your borough, city or town. (The 3-1-1 hotline will be open to check on those.)
• Most major attractions, including the Botanical Gardens, the Montreal Science Centre, the Insectarium and the Planetarium will remain open both days (keep in mind that the Biodome remains closed for major renovations).
• La Ronde is open, and so is the Casino.
• There's no holiday from parking restrictions (you'll still have to abide by them) or from parking meters (you'll still have to feed them)
• Buses and metros will operate on reduced schedules on Monday — though commuter trains will follow their normal schedules on Monday, meaning all six lines will be running as they usually would.