Singapore doesn't observe daylight saving time but Vienna does. DST in Vienna started on 31 March 2019 and will end on 27 October 2019. Once DST ends in Vienna the time difference between Vienna and Singapore will be 7:0 hours.
Time zone: CEST - Central European Summer Time (UTC/GMT +2)DST started on 31 March 2019DST will end on 27 October 2019Time zone difference / Flight distance
Time zone: SGT - Singapore Time (UTC/GMT +8)Time zone difference / Flight distance