Saint John operates on Atlantic Standard Time (AST), which is UTC-4 during winter and Atlantic Daylight Time (ADT), which is UTC-3 during summer. To find the current time in Saint John, subtract 4 hours from UTC during winter months and 3 hours during summer months.

Yes, Saint John and most of Canada observe Daylight Saving Time. The clocks go forward 1 hour to Atlantic Daylight Time (ADT, UTC-3) in early March and go back 1 hour to Atlantic Standard Time (AST, UTC-4) in early November.

London (GMT/BST): Saint John is 4 hours behind London when the UK is on GMT (winter), and 5 hours behind when the UK is on BST (summer). During Canada's summer (when ADT is in effect), subtract 1 more hour from the difference.

New York (EST/EDT): Saint John is 1 hour ahead of New York when NY is on EST (winter), and the same time when NY is on EDT (summer). During Canada's summer (when ADT is in effect), Saint John is 1 hour ahead of NY during EDT.

Tokyo (JST): Saint John is 13 hours behind Tokyo, as Japan Standard Time is UTC+9. During Canada's summer (when ADT is in effect), Saint John is 12 hours behind Tokyo.

Canada's major cities include Toronto (the largest), Montreal, Vancouver, Calgary, Ottawa (the capital), Edmonton, and Winnipeg. Saint John is the largest city in New Brunswick.

Saint John is the largest city in New Brunswick and known for its historic port, the Reversing Falls, the Saint John City Market (one of Canada's oldest continuously operating markets), beautiful Bay of Fundy, and as a major industrial and shipping center. The city is also famous for its Loyalist heritage and historic architecture.