City history
From the Roman tax station of Turicum to precision railway timekeeping, Zurich evolved through local solar time and Bernese telegraph time into Central European Time.
Chapter one
Earliest documented name
"Belonging to Turos or place of Turos"
First documented in the late 2nd century AD on a Roman tombstone discovered on Lindenhof hill, reading STA(tio) TURICEN(sis) to mark a Roman customs and tax-collecting station.
Belonging to Turos or place of Turos
Roman vicus and customs station established on Lindenhof hill along the Limmat river route.
Early Germanic evolution of Turicum
Early medieval transitional forms recorded as Alemannic Germanic influences reshaped the regional language.
High German development from Ziurichi
Adopted as the official German name for the city and canton, locally pronounced in Swiss German as Züri.
Chapter two
Swiss postal and telegraph services standardized on Bernese local mean time (UTC+00:29:45.5), replacing independent local solar times across Swiss towns including Zurich.
Switzerland officially introduced Central European Time (UTC+01:00) nationwide on June 1, 1894, synchronizing timekeeping across Zurich and the federal railway network.
Switzerland briefly tested summer daylight saving time during World War II between May 1941 and October 1942 before reverting to standard CET.
Following a 1978 referendum rejection and subsequent federal reversal, Switzerland introduced Central European Summer Time (UTC+02:00) on March 29, 1981, to maintain synchronized transport schedules with neighbouring nations.
Chapter three
St. Peter's Church in Zurich installed its monumental tower clock, featuring an 8.7-meter face diameter that remains the largest church clock face in Europe.
The Zurich Astronomical Commission calculated local solar noon from Zunfthaus zur Meisen, establishing the precise geographical coordinates and local solar time of the city.
Zurich opened the Urania Sternwarte, a public observatory set atop a 51-meter tower with a 12-ton Carl Zeiss refracting telescope mounted on anti-vibration concrete pillars.
Swiss engineer Hans Hilfiker designed the SBB railway station clock at Zurich-headquartered Swiss Federal Railways, featuring synchronized minute jumps and a distinctive red signaling second hand.