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In Australia, the number 1194 was the speaking clock in all areas. The service started in 1953 by the Post Master General's Department, originally to access the talking clock on a rotary dial phone, callers would dial "B074", during the transition from a rotary dial to a DTMF based phone system, the talking clock number changed from "B074" to 1194.
On 15 July 1945, the clocks were put back by an hour, so BDST reverted to BST; the clocks were put back by an additional hour on 7 October 1945, so BST reverted to GMT for the winter of 1945. [6] The United Kingdom experimentally adopted Central European Time by maintaining Summer Time throughout the year from 1968 to 1971. [7]
Railway time. Clock on The Exchange, Bristol, showing two minute hands, one for London time ( GMT) and one for Bristol time (GMT minus 11 minutes). Railway time was the standardised time arrangement first applied by the Great Western Railway in England in November 1840, the first recorded occasion when different local mean times were ...
These automatic signal clocks were synchronizedby telegraphyin 1905 before the widespread use of radio. A time signalis a visible, audible, mechanical, or electronic signalused as a reference to determine the time of day. Church bellsor voices announcing hours of prayergave way to automatically operated chimeson public clocks; however, audible ...
Time clock. A time clock, sometimes known as a clock card machine, punch clock, or time recorder, is a device that records start and end times for hourly employees (or those on flexi-time) at a place of business. In mechanical time clocks, this was accomplished by inserting a heavy paper card, called a time card, into a slot on the time clock.
[a] Using telescopes, GMT was calibrated to the mean solar time at the Royal Observatory, Greenwich in the UK. Chronometers or telegraphy were used to synchronize these clocks. [4] Standard time zones of the world. The number at the bottom of each zone specifies the number of hours to add to UTC to convert it to the local time.
Standard time is the synchronization of clocks within a geographical region to a single time standard, rather than a local mean time standard. Generally, standard time agrees with the local mean time at some meridian that passes through the region, often near the centre of the region. Historically, standard time was established during the 19th ...
Greenwich Mean Time is defined in law as standard time in the following countries and areas, which also advance their clocks one hour (GMT+1) in summer. United Kingdom, where the summer time is called British Summer Time ( BST) Ireland, where it is called Winter Time, [ 22] changing to Standard Time in summer.