Question

How many time zones are shared by the 48 conterminous us states and Canadian provinces

Answer 1

six time zones are present in the 48 contiguous us states and all canadian provinces. four are shared between the two the two countries while two are present
only in canada.

Answer 2

Six time zones are present in the 48 Contiguous US States and all Canadian provinces. Four are shared between the two countries while two are present only in Canada.