<Tr> <Td> 2019 </Td> <Td> March 10 </Td> <Td> November 3 </Td> </Tr> <Tr> <Td> 2020 </Td> <Td> March 8 </Td> <Td> November 1 </Td> </Tr> <Tr> <Td> 2021 </Td> <Td> March 14 </Td> <Td> November 7 </Td> </Tr> <Tr> <Td> 2022 </Td> <Td> March 13 </Td> <Td> November 6 </Td> </Tr>

Who observes daylight savings time in the u.s