<Tr> <Th> Period </Th> <Th> Calculation </Th> <Th> Span </Th> <Th> Years (approx .) </Th> </Tr> <Tr> <Td> k'in </Td> <Td> 1 day </Td> <Td> 1 day </Td> <Td> </Td> </Tr> <Tr> <Td> winal </Td> <Td> 1 x 20 </Td> <Td> 20 days </Td> <Td> </Td> </Tr> <Tr> <Td> tun </Td> <Td> 18 x 20 </Td> <Td> 360 days </Td> <Td> 1 year </Td> </Tr>

When did the zapotec civilization arise and fall