<Tr> <Th> 24 - hour clock </Th> <Th> 12 - hour clock </Th> </Tr> <Tr> <Td> 00: 00 </Td> <Td> 12: 00 midnight (start of the day) </Td> </Tr> <Tr> <Td> 01: 00 </Td> <Td> 1: 00 a.m. </Td> </Tr> <Tr> <Td> 02: 00 </Td> <Td> 2: 00 a.m. </Td> </Tr>

When is 1 day 17 hours from now