Expanded Sunday, holiday shopping hours will give Manitoba stores more flexibility, advocate says Expanded Sunday shopping hours in Manitoba could open up more opportunities for retailers even while their doors remain closed to the public, according to a retail advocacy group. Social Sharing CBC News · Posted: Dec 13, 2020 6:55 PM CT | Last Updated: December 14, 2020 The recently passed Bill 4, known as the Retail Business Hours of Operation Act, lets Manitoba businesses choose to remain open longer than before on Sundays and statutory holidays.(Piman Khrutmuang - stock.adobe.c)