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WORLD TIME ZONES

Monday, December 14, 2009

CALCULATinG youR.BiRtHCHARt PARt 2:
VnDERSTAnDinG
WORI--D TimE zon es
Time zones vary across the world, but astrologers base their calculations
on the time set at the Greenwich Observatory in London, England.
When you
record your
exact time of
birth, as explained in
Your Personal Astrology
Course, card 3, you may
wonder why time varies
so much between US
locations. After all,
everyone tends to agree
that it is dark
at midnight and bright
at noon. But, midnight
and noon actually come at
different times in different
places on the globe.
That can be a real
problem for astrologers
calculating charts and
horoscopes.
Whose noon?
Astrologers' solution is to
convert all local times to
Greenwich Mean Time
(GMT), no matter where
in the world they are. If
you want to know the
position of the Sun at
"noon," you need to be
sure you know which
state, or even country's,
"noon" you're talking
about! Then, you can
convert the time to GMT.
If you're unsure about
how to make the
conversion, check your
local library records, or
refer back to Your Personal
Astrology Course, card 3.
WORLD STANDARD
TimE ZONES
In order to make conversion
to Greenwich Mean lime
(GMT) as easy as possible,
the world is divided into 24
time zones, all of which are a
set number of hours different
from GMT
EQUAL TIME ZONES
Each of the 24 time zones
is 15 degrees of longitude
wide. There are 360 degrees
of longitude around the
Earth, which is divided by 24,
giving the value of 15
degrees longitude for each
time zone.
There are 25 world time
zone lines, including one at
each end of the 24 zones,
dividing the zones from GMT
minus 12 hours, through 0
hours (GMT), to GMT plus 12
hours (see chart above). Each
zone is an increment of
fifteen degrees of longitude
east or west of the GMT
zone line.
LOCAL CONVENIENCE
You'll notice that the time
zone lines sometimes cut
through a state or country,
putting eastern areas in
one time zone and western
areas in another. Where this
happens, generally all the
clocks in that state or country
will be set to the same time
for convenience - as if the
time zone line had skirted
around its border.
~CORPiIIG +trrr e
Across the world and throuqhout the ages, various methods if timekeepinp
have been employed, all if which have centered around the Sun.
LOCAL WAYS OF ~RECORDTimE
Local Mean Time is,
simply put, the time
according to the Sun. For
millennia, people have
measured time based on
the position of the Sun in
the sky, with noon falling
when it was at its highest
point.
MECHANICAL TIME
Sundials were used up
until the Middle Ages in
Europe, when mechanical
clocks began to appear.
Cities would set their
town clock by measuring
the position of the Sun,
but every city would be on
a slightly different time.
Also, the time
difference between one
noon and the next varies
throughout the year.
To account for these
differences, a fictitious
Sun, "The Mean Sun,"
was invented to
average out local time.
Local Mean lime varies
by about four minutes for
every degree of longitude
and is not generally used
in modern times except in
very specific astrology.
Now, cities within the
same time zone, state
or country will set their
clocks to the same time.
Local time, the time
according to the
Sun, is only used by
astrologers for very
specific calculations.
LOCAL STAIIDARP TimE
Standard time is the time you see
when you look at a clock. The
concept was adopted in the 19th
century in an attempt to end the
confusion caused by each
community using its own time.
Until there was standard time, a
telegraph wired from one country
early on Saturday morning could
arrive "instantaneously" in another
country on a late Friday night.
LEGAL IMPLICATIONS
Two babies born at the same
moment, but in different parts of
the country, might be born officially
on two different days - with legal
implications for inheritances.
A country's standard time is
usually established by law. This is
the time you will record as your
time of birth and convert to GMT
in your astrological calculations.
Standard time became necessary with the
development of railroad systems and the
confusion of schedules between stops.
G~EIIWicH MEAII timE
GMT is the same all year long
and is not affected by the
changing of the clocks for DST.
GMT is used as the United
Kingdom's standard time during
winter.
GMT was first adopted
universally in 1884. At that time,
the International Date Line was
established. It is the line of
DAYLiGHT
SAviIIG TimE
Most US states change their clocks in
spring and in the fall, a practice known
as Daylight Saving lime (DST).This
was introduced across the world in
1916 to make better use of daylight.
The start of DST in most US states is
now set at 2:00am on the first Sunday
in April and is changed back on the last
Sunday in October.
.:. Worldwide usage
The only major industrialized country
not to have introduced DST is Japan.
The day on which the clocks change
differs around the world.
.:. In the tropics
Equatorial and tropical countries do
not observe DST. Daylight hours are
similar in every season, so there is
no advantage to changing the clocks.
which is now recognized as th
standard international time
system. The military use letter
to denote each time zone, so
GMT is also sometimes
referred to as Z or Zulu time.
GMT and UT refer to the
time set by the Greenwich
Observatory in the UK - the
center of astrological time.
longitude exactly one-half way
around the globe (180°) from
Greenwich, England (0°), the
Prime Meridian.
UNIVERSAL TIME
Officially, GMT no longer exists.
Since 1972, the time on the
Prime Meridian has been
referred to as Universal lime,
GREENWICH MEAN
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Member Comments About This Blog Post
  • 14RIGHT
    Great explanation, in my line of work I use Zulu time every day but I still learned a couple of tidbits. I think for complexity sake you could expound on the International Date Line, the places like Afghanistan that actually are a Half hour off and of course Polar Time. When you get al that worked in let me know and I can expound on great circle route and leap year considerations. LOL


    emoticon Hmm, what time is it??
    3095 days ago

    Comment edited on: 12/26/2009 4:19:34 AM
  • SPARQUEE
    I guess I don't understand the purpose of this blog. Sorry, Rhonda.
    3105 days ago
  • CRAZYGAGRANNY
    emoticon I thought I knew where I was and what time it was before that???Now I don't know if it is a.m. or p.m. daylight standard time or eastern standard time???? Total confused again....course you knew it was going to mess this ole farm girl up! emoticon

    Thanks ....that was quite a bit of interesting info you found there! emoticon
    3106 days ago
  • SPARKLEMAMMY
    emoticon emoticon emoticon
    3106 days ago
  • RD03875
    Love that cut and paste.
    3106 days ago
  • VICIOUS421
    Loved the blog but got lost in it, think all the time zone stuff threw me off! LOL We do daylights savings time here and I don't like it, I always feel like I have jet lag for a few days when we 'Spring forward'. I am with my grandfather on this, he owned a small general store way back in the 40s and 50s until he passed away in 1968 and he never changed the time on his watches or clocks, set his store hours that way too!LOL Wish I could get away with that!
    emoticon
    3106 days ago
  • GOING-STRONG
    My head is spinning! Very interesting tidbit about 2 babies born at the same moment in different times zones could have different birth dates which could affect an inheritance... Who knew ~ but makes sense! Hugs to you, R.
    3107 days ago
  • JHADZHIA
    I am happy my little backwoods province doesn't use daylight savings time. It would drive me nuts trying to figure out what time it was and try to adjust to a new time to get up, go to work, etc. I will keep it the way it is thanks!
    Thanks for all the info. Yahoo mail uses that Greenwich time -whatever so I am never sure when I get an e-mail at what time it was actually sent! Confusing stuff!
    emoticon emoticon emoticon
    3107 days ago
  • MAYLINGSNW
    ok you do have alot of time...now you get to do mine!!!!
    how have you've been???haven't talked to you in a long while...how is adam?ron?ok and you!!!catch you later!!!!
    3107 days ago
  • ALEXSGIRL1
    omg have you had to much coffee. emoticon you always write short blogs. thanks for all the explaining but i still dont understand.i just know when i am tired i go to bed, hungry time to eat. oh well i will have to show your blog to the husband and then he will attempt to explain the whole darn thing to me again. and i'll still say i don't understand emoticon you are priceless my friend. what time is it anyway? emoticon emoticon
    3107 days ago
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