<Table> <Tr> <Th> Territory </Th> <Th> Standard </Th> <Th> DST </Th> </Tr> <Tr> <Td> Heard and McDonald Islands </Td> <Td> UTC + 05: 00 </Td> <Td> no DST </Td> </Tr> <Tr> <Td> Cocos (Keeling) Islands CCT </Td> <Td> UTC + 06: 30 </Td> <Td> no DST </Td> </Tr> <Tr> <Td> Christmas Island CXT </Td> <Td> UTC + 07: 00 </Td> <Td> no DST </Td> </Tr> <Tr> <Td> Norfolk Island NFT </Td> <Td> UTC + 11: 00 </Td> <Td> no DST </Td> </Tr> <Tr> <Td> Australian Antarctic Territory--Mawson </Td> <Td> UTC + 05: 00 </Td> <Td> no DST </Td> </Tr> <Tr> <Td> Australian Antarctic Territory--Davis </Td> <Td> UTC + 07: 00 </Td> <Td> no DST </Td> </Tr> <Tr> <Td> Australian Antarctic Territory--Casey </Td> <Td> UTC + 11: 00 </Td> <Td> no DST </Td> </Tr> </Table> <Tr> <Th> Territory </Th> <Th> Standard </Th> <Th> DST </Th> </Tr> <Tr> <Td> Heard and McDonald Islands </Td> <Td> UTC + 05: 00 </Td> <Td> no DST </Td> </Tr> <Tr> <Td> Cocos (Keeling) Islands CCT </Td> <Td> UTC + 06: 30 </Td> <Td> no DST </Td> </Tr>

Why do we have different time zones in australia