In a message dated 6/10/2005 2:53:51 PM Eastern Standard Time, [EMAIL PROTECTED] writes:
Does anyone know how mean time is set up?
To clarify, I know that local mean time has 24 hours every day set for a mean daily rotation for any particular location. I understand that timezones are set up by the local mean time for the center of every 15 degrees of longitude, i.e. 0, 15, 30, 45 etc.
What I don't understand is how was it chosen when 12:00 AM/PM would be.
I used to think that mean time was set by the equinox that midday was 12:00 for the whole year. This is obviously incorrect as the equation of time which shows how much local mean time is off from apparent solar time is not 0 at 12 on the equinox.
If anybody can explain to me what and how mean time was set up, I would appreciate it.
Thanks,
Noam Kaplan
N 40.5833 W 74.1166
Staten Island
