Singapore doesn't observe daylight saving time but Adak does. DST in Adak started on 10 March 2019 and will end on 03 November 2019. Once DST ends in Adak the time difference between Adak and Singapore will be 18:0 hours.
Time zone: HADT - Hawaii-Aleutian Daylight Time (UTC/GMT -9)DST started on 10 March 2019DST will end on 03 November 2019Time zone difference / Flight distance
Time zone: SGT - Singapore Time (UTC/GMT +8)Time zone difference / Flight distance