On Jul 9, 2012, at 10:30 AM, Poul-Henning Kamp wrote: > I'm not talking about astronomy, I'm talking about how humans have > implemented "day" in their daily lives.
I'm not talking about astronomy either. But when discussing how civil engineers implement "gravity" on a daily basis, it sometimes becomes necessary to look at a physics textbook. > China is one big timezone, DST also exploits the vast tolerance humans have > for where the sun is in the sky when they eat. > > So yes, it may be the "synodic day" but it is "the synodic day with a > precision of about 1/6 rotation or so" But it is not (currently) "the synodic day shifting 355 meters to the east with each missed leap second" (http://goo.gl/230Zk). The issue (discussed many times previously) is to avoid introducing a secular trend into UTC. Rob _______________________________________________ LEAPSECS mailing list [email protected] http://six.pairlist.net/mailman/listinfo/leapsecs
