at 02:00 to 03:00 and at 03:00 to 02:00 respectively

2015Sun, 29 Mar, 02:00EET → EEST+1 hour (DST start)UTC+3h Sun, 25 Oct, 03:00EEST → EET-1 hour (DST end)UTC+2h2016Sun, 27 Mar, 02:00EET → EEST+1 hour (DST start)UTC+3h Sun, 30 Oct, 03:00EEST → EET-1 hour (DST end)UTC+2h2017Sun, 26 Mar, 02:00EET → EEST+1 hour (DST start)UTC+3h Sun, 29 Oct, 03:00EEST → EET-1 hour (DST end)UTC+2h2018Sun, 25 Mar, 02:00EET → EEST+1 hour (DST start)UTC+3h Sun, 28 Oct, 03:00EEST → EET-1 hour (DST end)UTC+2h

Please take consideration for changes in tzdata 

PS. Sorry for my english

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