<Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (August 2014) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (August 2014) (Learn how and when to remove this template message) </Td> </Tr> <Table> <Tr> <Th_colspan="2"> Central Time Zone (North America) </Th> </Tr> <Tr> <Td_colspan="2"> Regions in the Central Time Zone prior to 2015 (Quintana Roo is now in the Eastern Time Zone) </Td> </Tr> <Tr> <Th_colspan="2"> UTC offset </Th> </Tr> <Tr> <Th> CST </Th> <Td> UTC − 6: 00 </Td> </Tr> <Tr> <Th> CDT </Th> <Td> UTC − 5: 00 </Td> </Tr> <Tr> <Th_colspan="2"> Current time (Refresh the clock .) </Th> </Tr> <Tr> <Th> CDT </Th> <Td> 12: 43 pm on May 30, 2018 </Td> </Tr> <Tr> <Th> CST </Th> <Td> 11: 43 am on May 30, 2018 </Td> </Tr> <Tr> <Th_colspan="2"> Observance of DST </Th> </Tr> <Tr> <Td_colspan="2"> DST is observed in certain regions of this time zone between the 2nd Sunday in March and the 1st Sunday in November . </Td> </Tr> <Tr> <Th> DST began </Th> <Td> Mar 11, 2018 </Td> </Tr> <Tr> <Th> DST ends </Th> <Td> Nov 4, 2018 </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Central Time Zone (North America) </Th> </Tr>

When do we change from cst to cdt