Day Date Month Holiday
Sunday 01 Jan New Year's Day
Saturday 28 Jan Chinese Lunar New Year's Day
Tuesday 28 Mar Bali's Day of Silence and Hindu New Year
Friday 14 Apr Good Friday
Monday 24 Apr Ascension of the Prophet Muhammad
Monday 01 May International Labor Day
Thursday 11 May Waisak Day (Buddha's Anniversary)
Thursday 25 May Ascension Day of Jesus Christ
Monday 26 Jun Idul Fitri Day 1
Tuesday 27 Jun Idul Fitri Day 2
Thursday 17 Aug Indonesian Independence Day
Saturday 02 Sep Muslim Day of Sacrifice (Idul Adha)
Friday 22 Sep Muharram/Islamic New Year
Friday 01 Dec The Prophet Muhammad's Birthday
Monday 25 Dec Christmas Day
Source: https://www.timeanddate.com/holidays/indonesia/2017#!hol=9