Final answer:
Saskatchewan primarily follows Central Standard Time without daylight saving time, Manitoba is in the Central Time Zone, and Ontario is mostly in the Eastern Time Zone but has some areas in the Central Time Zone.
Step-by-step explanation:
In the winter, the time zones for the provinces you've mentioned in Canada are as follows: Saskatchewan predominantly uses the Central Standard Time (CST) and does not observe daylight saving time. Manitoba is in the Central Time Zone (CT) and moves between Central Standard Time (CST) in the winter and Central Daylight Time (CDT) during the summer months. As for Ontario, it is partially divided between the Eastern and Central Time zones. The majority of Ontario is in the Eastern Time Zone (ET), but some areas in the western part of the province, near the border with Manitoba, are in the Central Time Zone. This reflects the standard time with the local mean solar time of a longitude running through each zone. Different from the Pacific Standard Time which is 3 hours behind Eastern Standard Time, Central Standard Time is only 1 hour behind Eastern Standard Time.