Dubai doesn't observe daylight saving time but Barcelona does. DST in Barcelona started on 31 March 2019 and will end on 27 October 2019. Once DST ends in Barcelona the time difference between Barcelona and Dubai will be 3:0 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: GST - Gulf Standard Time (UTC/GMT +4)Time zone difference / Flight distance