Here's a partial list of what's open and closed for Labour Day. 

The STM will be operating on its holiday schedule on Monday. 

Some trains on the AMT will be on a Sunday schedule, but there will be no service on the Candiac, St. Hilaire, and Mascouche lines.

Public transit in Laval will operate on a Sunday schedule. Same in Longueuil.

Most municipal offices in Montreal and surrounding suburbs will be closed

Garbage/recycling pickup will happen as normal, except bulk pickup in CDN/NDG is cancelled

Ecocentres remain on summer schedule and will be open from 8 a.m. to 6 p.m.

Claude Robillard Sports Complex and outdoor tennis courts are closed.

Pools, Sports Centres, and Libraries vary by borough

Municipal offices and services in Longueuil are closed

Insectarium and Botanical Garden open from 9 a.m. to 9 p.m.

Biodome open from 9 a.m. to 6 p.m.

Planetarium open from 9 a.m. to 5 p.m.

Montreal municipal court is closed

Bonsecours Market is open from 10 a.m. to 9 p.m.

Pointe à Calliere is open from 10 a.m. to 5 p.m.

Parking Meters are operational

Many SAQ outlets, but not all, will be open on Monday. 

Many grocery stores will be closed or have limited hours.