hideyuki at sat.t.u-tokyo.ac.jp
Mon Nov 16 03:41:25 UTC 1998
From: Hideyuki Suzuki <hideyuki at sat.t.u-tokyo.ac.jp>
Subject: Re: FW: Asia/Ishigaki?
Date: Thu, 12 Nov 1998 01:44:27 +0900
> > only JST (+0900) is used everywhere in Japan including Ishigaki island.
> > Can you please forward a reference for this? This will be useful when
> > correcting the tables. In particular, is this a recent change, or has
> > Ishigaki always used JST?
> Okay, I have no reference fot this now. As far as I know, the law
> enacted in 1886 says that the standard time for general use in this
> country is defined as the time on the meridian at E135 degree.
> (This sentence may not be precise due to my bad English.)
> At this time, Ishigaki is in the possessions of Japan.
> It may be changed later, but maybe I can find it in Japanese law.
> I'll report the result if I find it.
I asked about it to Frequency and Time Standards Section in Communications
Research Laboratory, where JST is maintained.
Before the World War II, there are several laws regarding standard time.
As I wrote, the ordinance No. 51 (1886) established "standard time" in Japan,
which stands for the time on E 135 degree.
In the ordinance No. 167 (1895), "standard time" was renamed to "central
standard time". And the same ordinance also established "western standard
time", which stands for the time on E 120 degree. This may be a ground
of +0800. But "western standard time" was abolished in the ordinance
No. 529 (1937). In the ordinance No. 167, there is no mention regarding
for what place western standard time is standard...
Please note that, since then, there has been no law which support standard
time except for JST.
I wrote "ordinance" above, but I don't know how to translate.
In Japanese it's "chokurei", which means ordinance from emperor.
They said there are no law regarding standard time in these days.
However, they said that it is correct to say there are only one timezone
now in Japan in the legal and factual sense.
There may be no good reference to state there are only one timezone...
More information about the tz