Canada AWS

AWS says that Montreal is Central in Canada.It is not.It is Eastern in Canada.They also say that there is two  zones  what are they?When the zone of Montreal is searched no checkmarks exist for many services like  Canada (Central) Region
EC2 Availability Zones: 2
Launched 2016 ,https://aws.amazon.com/about-aws/global-infrastructure/ ,https://aws.amazon.com/canada/?p=gi ,https://aws.amazon.com/canada/aws-in-canada/ ,https://aws.amazon.com/about-aws/global-infrastructure/regional-product-services/ .The center of Canada:https://centreofcanada.ca/home/ .