<Tr> <Th_colspan="2"> Twelfth Night </Th> </Tr> <Tr> <Td_colspan="2"> Mervyn Clitheroe's Twelfth Night party, by "Phiz" </Td> </Tr> <Tr> <Th> Observed by </Th> <Td> Christians </Td> </Tr> <Tr> <Th> Type </Th> <Td> Christian </Td> </Tr>

When does the twelve days of christmas start and end