The time - as a function of the local situation (see: Time belt) - by midnight, the beginning one daily, measured.The day is usual in 24 hours (exception see:Switching second), which divides hour into 60 minutes and the minute in 60 seconds.
At present the French revolution a unsuccessful attempt was undertaken, the day in 10 hours with everTo divide 100 minutes and 100 seconds.
Sometimes in the scientific-technologic range time measurement is indicated as floating point number. To 8 then 0,333 corresponds to o'clock in the morning… Days. In some operating systems the calendar date is generated from the time, by of a defined time those Milliseconds to be counted.
In many ranges the time, if it falls on midnight, is indicated either as 24:00 clock or 00:00 clock. 24:00 clock refers to the Vortag, 00:00 clock to the following day. E.g. comes. a course over24:00 clock to 12. January on and drives to 13. Off, then he held hardly one minute for January around 00:00 clock, because between the times less than one minute lies.
Table of contents
way of writing
the way of writing of clock times regulates for the FRG the DIN 5008. It arranges the parts of clock times with colons. Hours, minutes and if necessary. Secondsare to be indicated for it in two digits. If one indicates only the hour, one may do that one-digit. The designation „clock “is to be always separated by a blank. Examples:
- 7 o'clock or 07 o'clock
- 09:07 clock (however not: 9:07 clock)
- 09:31: 52 o'clock (however not:9:31: 52 o'clock)
manner of speaking
depending upon region is usual different discussions. Thus 05:45 clock in the northwest of the German-speaking countries is usually called “quarter before six” and 05:15 clock as “quarter after five”, during in Austria, parts Bavaria, Saxonia, Thuringia, Saxonia-Anhalt, Mecklenburg-Western Pomerania, Brandenburg and parts of Baden-Wuerttemberg “three-quarter six” and/or “quarter six” usual are.
traditional is measured the time regarding the position of the sun. The highest conditions of the sun(Noon) is clearly fixed, and serves as reference measure.
There the time of noon (and/or. Midnight) at places, which are not on the same degree of longitude, is different, possesses each degree of longitude its own true local time. This true local time is sufficiently, so longno journeys with clocks between places of different local time to be accomplished. With the arising of the railway the necessity developed to synchronize times between different places. This led to the introduction of time belts.
A further complication is the fact that the coursethe earth around the sun no circle separate an elliptical orbit is and the Erdachse is bent to this. Therefore the temporal distance between successive sun maximum conditions (noon) is from day to day not constant. The local Sonnenzeit leads thusto days of different length. In order to achieve days of equal length, a middle local time in such a way specified is defined, which is common today nearly everywhere. With the middle local time thus the highest level of the sun is not always to the same time. The difference betweenthe middle local time and actual local time calls one Zeitgleichung.
Wikipedia on the left of to the group of topics calendar and time
|Article for the chronology of mankind:|
|linear units of the time calculation||cyclicUnits of the time calculation|
|millenium||century||decade||year (calendar)||month||week||day (calendar)|
|starting from 10. Millenium v. Chr.||starting from 40. Century v. Chr.||starting from 390er v. Chr.||starting from 400 v. Chr.||1. January to 31. December|
|further one Article about time:|
|An overview of entire geologic history offers the geological time scale.|
|From the Big Bang to the emergence of the earth see early history of the universe.|
|For the units of time measurement see: Second, minute, hour.|
Web on the left of
- http://www.ptb.de/de/zeit/uhrzeit.html legal time for Germany of the Federal Standards Laboratory (PTB), second-exact expenditure as Java applet.
- http://www.ramtha.com/html/world-tour/timecalc.htm world time
- http://www.norddeutschelernendieuhrzulesen.de further information to the manner of speaking