TIME

Prime Meridian (0 degrees longitude) passes through Grenwich (in London). Why the world standard? Because England ruled the waves when they were setting it all up m'lad! Where would you choose? It's arbitrary after all...

If they were doing it all again today it might pass through Washington. In a few decades, through Beijing. (Personally I'd have it passing through Italy - lovely place).

0 degree longitude is passing thro grennwich wat abt the equator? is it passing thro greenwich?

No, you dope!

In the old days, sailors could use latitude to determine how far North or South they had gone by measuring the position of the stars in the sky, but they could not determine how far West or East they had traveled.

The solution was to set someplace in the world as THE point for time. They just chose Greenwich England as that point. Then, the ships could carry a precise clock, and by comparing the clock (Set to Greenwich time) to the time of day where they were by the location of the Sun, they could calculate their East/West position. And they measured their East/West position in degrees Longitude.

It could be a lot worse -the French might have it !

They'd have made the time from 12:00 noon to 1:00 at least 100 minutes long.

Lot more scientific-METRIC-DECIMALIZED

How about a discussion?

Much more sensible - 10 months of 36 days each, then a five day holiday (six days each leap year).

20 hour days of 100 minutes each, each with 100 seconds (imagine the records falling at the next Olympics).

And of course the Prime Meridian going through Australia.

But isn't this whole decimal/metric thing passé? Shouldn't a kilo really be 1024?

I propose that there be 2 hours per day, 8 days per week (I lo o o o ove you), 4 weeks per month, 16 months per year, 128 years per "century", and 1024 years per millennium, which we will call a kiloyear.

The only sensible location for the prime meridian to pas through would be Bitburg, Germany.

Yes because it goes through Greenwich Eng. But there are many meridians recognized my different countries.

Because Greenwich is the location of the Royal Observatory. The old sailors would set their ships clocks to the time there as reference for navigational purposes. There were others but thats the one that stuck. Mainly do to the greatness of the British Navy at the time and their exploration of the world. There is only one earth if we are to set a standard for time. It has to be some where and I do not think many of the peoples at this time of discovery kept time as the people of the old world did.

And Popeye uses it to tell when it's time to eat his spinach.

In ye olden days, people were employed to 'walk the time' from Grenwich. They had the only reliable clock, so it was used to set a portable clock that was carried around London. This was used by businesses (all those shiiping/banking/insurance companies)etc to keep their own clocks synchronized. I couldn't find a link, but somewhere I have a clipping on this which I'll post if I find it.

Now that gives new meaning to "calibration lab".

Here we go, 'selling time' and the Belville family.

Jupiter, the Royal Observatory was to observe the moons of the planet Jupiter. The positions of the moons would then tell you the time of day it was, in a particular month, and this place just happened to be in Grenwich. Zero Zulu.

Everyone uses it. All military (Zulu hour), the world time zones + or - Z. International flights and even the net. All e-mails wil have a tag that tells the time of day it was sent at + or - Zulu.

http://en.wikipedia.org/wiki/Greenwich_Mean_Time

Please would you be so kind as to take off your Caps Lock?

http://en.wikipedia.org/wiki/John_Harrison

http://en.wikipedia.org/wiki/International_Date_Line

NOBODY IS ABLE TO SAY THE ANSWER IN THEIR OWN THINKING DON'T JUST SEND THE LINK . K TELL ME EXACTLY Y THESE CONVENTIONS CAN NOT CHANGED EVEN NOW IN THIS MODERN WORLD?

Tell us why you want to change it, then we can tell you why you might be mad.

halo tell me the origin point of a sheet which we take generally

Where the x and y axis meet ? I've no idea what you mean.

we take 0,0,0 as origin am i right?

If you want to be 3-dimensional, yes. You can have the paper anyway up you want, but further drawing is difficult if you start redefining the origin. New drawings will get confused. Performing co-ordinate transforms all the time would be a pain.

but the place where u take reference is 0,0,. so u can't the standard time be in 0,0

Ragavan,

Is there a Ham radio club in your area? If so, go hang out, maybe even get your license. In the process, you'll see why Zulu matters and you'll get some neat practical experience.

y not.greenwich=0^o,equator=0^o.Usher time zero=4004bc.sorted.

i can't get u tell me clearly

Does it really matter where you start zero. From the kitchen, your moms house or from a rock in the Arctic tundra. The main reason you would want to know, is to be able to tell someone about it. So they could find the place that you were at, or to find your way back. The thing of how long the journey was, up down, left right and cold hot. Maybe because of greed, the people wanted to know where to go back to?

North American Natives could never get or be lost in the forest. Why? Because they would never have to somewhere, they where were they where, at what ever time, season, year. Only if you have to be at a place would you need to navigate. Hence the great line that no one can see, but still controls our time of day.

Besides, why would you take on the responsibility of time keeping, when nobody would think of paying for it.

I think you sould go hard and change the GMT to the middle of India. The reason that on one side of the line they would be one hour ahead of the other. They would not know if they were coming or going. Iceland is my chooce!

matt2u has just given a very good explanation above.

< I was being silly with Usher. Archbishop Usher decided that the world started at nightfall preceeding 23rd October 4004 BC, though there is some dispute,>

Hello ragavan

Swatch time is far more logical, refer: http://en.wikipedia.org/wiki/Swatch_Internet_Time

• Instead of hours and minutes, the mean solar day is divided up into 1000 parts called "beats".
• Each beat lasts 1 minute and 26.4 seconds.
• There are no time zones; instead, the new time scale of Biel Mean Time (BMT) is used, based on the company's headquarters in Biel, Switzerland. Despite the name, BMT does not refer to mean solar time at the Biel meridian, but is equivalent to Central European Time and West Africa Time or UTC+1. However, unlike Civil time in most European countries, Internet Time does not observe daylight saving time and thus it matches Central European Time during winter and Western European Summer Time, which is observed by the United Kingdom, Ireland, Portugal and the Canary Islands (Spain), during summer.
• The most distinctive aspect of Swatch Internet Time is its notation; as an example, "@248" would indicate a time 248 beats after midnight, equivalent to a fractional day of 0.248 CET, or 4:57:07.2 UTC.
• Although Swatch does not specify units smaller than one beat, third party implementations have extended the standard by adding "centibeats" or "sub-beats" as a decimal fraction, for extended precision: @248.00.^[2][3]
• No explicit format was provided for dates, although the Swatch website formerly displayed the Gregorian calendar date in the order day-month-year, separated by periods and prefixed by the letter d (d31.01.99).
• Like UTC, Swatch Time is the same throughout the world. For example, when the time is 875 beats, or @875, in New York, it is also @875 in Tokyo.

It is ideal in these days of Internet and 24/7 operations, because the Swatch time is exactly the same, wherever you are on Planet Earth, thus it is so easy to synchronise a meeting, between people anywhere.

And it is not a French Standard, either.

Kind Regards....