[1] Daylight saving time is observed from the last Sunday in March (02:00 CET) to the last Sunday in October (03:00 CEST).

[2] 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.

[3][4] Vienna eventually adopted CET on 1 April 1893.

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