Patna doesn't observe daylight saving time but Blacktown does. DST in Blacktown will start on 06 October 2019 and will end on 05 April 2020. Once DST starts in Blacktown the time difference between Patna and Blacktown will be 5:30 hours.
Time zone: IST - India Standard Time (UTC/GMT +5:30)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