![]() Since then, GMT is no longer a time standard. Until 1972, Greenwich Mean Time (also known as Zulu time) was the same as Universal Time (UT). UTC was adjusted several times until 1972, when leap seconds were introduced to keep UTC in line with the Earth's rotation, which is not entirely even, and less exact than atomic clocks. The name Coordinated Universal Time was officially adopted in 1967. In 1960, the International Radio Consultative Committee formalized the concept of UTC, and it was put into practice the year after. The transit circle is a part of the telescope's mechanics and it is still cited as the prime meridian's original reference (0° longitude). The reference line or starting point, the Prime Meridian, was determined to be the transit circle at the Royal Observatory in Greenwich, London. This is the basis for the 24-hour time zone system we know today.Īt the time, Greenwich Mean Time (GMT) was chosen as the world’s time standard. Universal Time (UT) was created at the International Meridian Conference in 1884. It is used to compare the pace provided by TAI with the actual length of a day on Earth. Universal Time (UT1): Also known as astronomical time or solar time, it refers to the Earth's rotation.International Atomic Time (TAI): A time scale that combines the output of some 400 highly precise atomic clocks worldwide, and provides the exact speed for our clocks to tick.Two components are used to determine UTC: The world's timing centers have agreed to keep their time scales closely synchronized - or coordinated - therefore the name Coordinated Universal Time. UTC is the time standard commonly used across the world. ©/stocknshares A Standard, Not a Time Zone The Greenwich Meridian in London, England. Business Date to Date (exclude holidays).Courses which begin precisely on the hour are designated "s.t." (= sine tempore) and would be listed as beginning at 9.00 s.t., 10.00 s.t., etc. Classes which begin fifteen minutes after the hour are designated "c.t." (= cum tempore) and would be listed as beginning at 9.00 c.t., 10.00 c.t., etc. This quarter-hour is known as the akademisches Viertel. Yet German universities have a tradition of beginning their classes fifteen minutes after the hour. When university students have an appointment with their tutors or professors, they should of course be punctual (pünktlich). There is slightly more leeway given in academic circles. So if you find yourself running late, make sure to ring up in advance and inform your hosts! Arriving "fashionably late" by ten or fifteen minutes - as is common in Britain - is viewed as a social faux pas. Note however that if somebody invites you for dinner at 7 o'clock, then that is the time that you are expected to turn up. It goes without saying that strict punctuality is expected for business appointments. Punctuality (die Pünktlichkeit) is taken very seriously in Germany. (It is ten thirty-four and thirty seconds) The twenty-four clock can of course also be used to express times where the minutes are not divisibleĮs ist dreiundzwanzig Uhr sechsundfünfzig / 23.56 UhrĪnd a German speaking clock always uses the twenty-four system, giving the number of seconds (= die Sekunde (-n)) along with the time in hours and minutes:Įs ist zehn Uhr dreiundvierzig Minuten dreißig Sekunden Thus the times shown on the previous page would be expressed as follows using the 24-hour system: Grammar 8: Minutes past the hour You cannot however say "halb null", just as you cannot say "halb dreizehn", "Viertel nach/vor dreizehn" etc. In written German however, the word "Uhr" comes after the minutes.Īlthough midnight can be expressed in the German 24-hour clock either as null Uhr or vierundzwanzig Uhr, you can only use null Uhr when you need to express that it is a number of minutes past midnight. When expressing the number of minutes after an hour in the German 24-hour system, you add the number of minutes after the word "Uhr" in spoken German. But the 24-hour system is also standard practice for all official time-telling including in the media, on train timetables and announcements of events etc. The 24-hour clock is used much more commonly in German-speaking countries than it is in Britain - not least because abbreviations such as A.M. ![]()
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