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BOSS61's Photo BOSS61 Posts: 6,653
3/10/19 11:36 A

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"The country now south of our border" she says...

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"Some day we will look back on this, and it will all seem funny" - Bruce Springsteen (The real BOSS, as opposed to me.)





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SYLPHINPROGRESS's Photo SYLPHINPROGRESS SparkPoints: (107,918)
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3/10/19 8:59 A

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How high was the sun when you started on that?

LAURIE, NYC

Tra-la-la.


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NUMD97's Photo NUMD97 Posts: 10,112
3/10/19 8:26 A

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And then there are the countries that try switching the times around like daylight savings time that was met with tremendous resistance until it was abandoned. I saw that first hand in the country that is causing all kinds of problems now south of our border.

Knowing is not enough. We must apply. Willing is not enough. We must do.
~ Goethe

Dare to dream.
~ Me


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BOSS61's Photo BOSS61 Posts: 6,653
3/10/19 7:22 A

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So being an earth scientist makes me an authority on time? (Sort of like being an authority on the weather?). Here goes nothing.



Consider the globe. 360 degrees around. In antquity, people called 12 Noon the time when the sun is highest in the sky. It's highest in the sky where I live 7 minutes later than in NYC, but if we could not agree on time standardization (hence the term, "Standard Time") trains would have been colliding with one another 125 years ago, so the railroads (in addittion to costing $200 to buy in Monopoly) gave us (and the rest of the world copy-catted) much needed time zones.



In general, there are 24 hourly time zones (before man interfered). (Yes, weird places like Iran have half-hourly time zones but lets keep it easy). Each hour is offset 15 degrees from the next. So each hour-long time-zone is centered on a meridian 15 degrees away from the next one. The width of a (natural) time zone thus, is 7.5 degrees either side of its central meridian (this is better drawn on beer-soaked wet napkins, but I try.)



So, GMT (Britain) is centered on Zero degrees. Azores time is centered on 15W longitude, Greenland time is 30W, Brazil time is 45W, Atlantic time is 60W and our Eastern time zone is supposed to be centered on 75W. Central Time is supposed to be centered on 90W and so forth. That means that 82.5W should be the line between Eastern and Central. Only its not (its generally fairly far west of that) because of stupid, irresonsible, ignorant and television-watching humans who would rather be on New York time for television than Chicago time.

Now Daylight time (welcome to man's further tampering) picks up our whole time zone, kit-and-kaboodle and drops it 15 degrees further east). As such, Eastern Daylight Time is GMT minus 4 hours, not 5, or the same as Atlantic Standard Time.

Hope this helped. If you don't like beer-soaked napkins, try coffee on your keyboard.

"Some day we will look back on this, and it will all seem funny" - Bruce Springsteen (The real BOSS, as opposed to me.)





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