Then Newfoundland would be 'on the hour' instead half past.

https://en.wikipedia.org/wiki/Newfoundland_Time_Zone

in the case of Canada-wide broadcasts timed to air at the same local hour in the rest of the country through the use of a different feed for each time zone (most commonly the CBC's radio and TV networks), Newfoundland uses Atlantic-time broadcasts. References to programs airing at "6:00, 6:30 in Newfoundland" are commonly heard across Canada.