Rarotonga doesn't observe daylight saving time but Sydney does. DST in Sydney will start on 06 October 2019 and will end on 05 April 2020. Once DST starts in Sydney the time difference between Rarotonga and Sydney will be 21:0 hours.
Time zone: CKT - Cook Island Time (UTC/GMT -10)Time zone difference / Flight distance
Time zone: AEST - Australian Eastern Standard Time (UTC/GMT +10)DST will start on 06 October 2019DST will end on 05 April 2020Time zone difference / Flight distance