<Tr> <Td_colspan="2"> The Adoration of the Magi . Fresco in the Lower Church of the Basilica of San Francesco d'Assisi in Assisi, Italy </Td> </Tr> <Tr> <Th> Observed by </Th> <Td> Christians </Td> </Tr> <Tr> <Th> Type </Th> <Td> Christian </Td> </Tr> <Tr> <Th> Observances </Th> <Td> Varies by denomination, culture, and nation </Td> </Tr>

When was the first day of christmas celebrated