In Austria, the standard time is Central European Time (CET; ). Daylight saving time is observed from the last Sunday in March (02:00 CET) to the last Sunday in October (03:00 CEST).
The Austro-Hungarian Empire adopted CET on 1 October 1891. At first railways and post offices, cities such as Prague and Budapest; however, not Vienna. Vienna eventually adopted CET on 1 April 1893.
In the IANA time zone database, Austria is given the zone Europe/Vienna.