Original sentence: Anti-capitalist protestors have chosen this day as Buy Nothing Day in North America (though this day is not especially important in Canada's commercial year [compare to boxing day]), where those concerned about the increasing power and influence of consumer corporations are urged to not make consumer purchases
Edited sentence: Anti-capitalist protestors have chosen this day as Buy Nothing Day in North America (though Canada has no equivalent event in its commercial cycle (except for boxing day)), where those concerned about the increasing power and influence of consumer corporations are urged to not make consumer purchases