Saint-Denis doesn't observe daylight saving time but Helsinki does. DST in Helsinki started on 31 March 2019 and will end on 27 October 2019. Once DST ends in Helsinki the time difference between Saint-Denis and Helsinki will be -2:0 hours.
Time zone: RET - Reunion Time (UTC/GMT +4)Time zone difference / Flight distance
Time zone: EEST - Eastern European Summer Time (UTC/GMT +3)DST started on 31 March 2019DST will end on 27 October 2019Time zone difference / Flight distance