<Tr> <Th> DST begins </Th> <Td> Mar 11, 2018 </Td> </Tr> <P> The North American Central Time Zone (CT) is a time zone in parts of Canada, the United States, Mexico, Central America, some Caribbean Islands, and part of the Eastern Pacific Ocean . </P> <P> Central Standard Time (CST) is six hours behind Coordinated Universal Time (UTC). During summer most (but not all) of the zone uses daylight saving time (DST), and changes to Central Daylight Time (CDT) which is five hours behind UTC . </P> <P> The province of Manitoba is the only province or territory in Canada that observes Central Time in all areas . </P>

What does cdt stand for in time zones