Sunday 01 Jan New Year's Day
Friday 06 Jan Epiphany
Sunday 08 Apr Easter Sunday
Monday 09 Apr Easter Monday
Tuesday 01 May Labor Day
Thursday 17 May Ascension Day
Sunday 27 May Whit Sunday
Monday 28 May Whit Monday
Thursday 07 Jun Corpus Christi
Wednesday 15 Aug Assumption of Mary
Friday 26 Oct National Day
Thursday 01 Nov All Saints' Day
Saturday 08 Dec Immaculate Conception
Tuesday 25 Dec Christmas Day
Wednesday 26 Dec St. Stephen's Day
Source: http://www.altiusdirectory.com/Society/public-national-holiday-in-austria.html