Saint-Denis doesn't observe daylight saving time but Athens does. DST in Athens started on 31 March 2019 and will end on 27 October 2019. Once DST ends in Athens the time difference between Saint-Denis and Athens 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