FW: Time Zone: Malaysia & Singapore
Olson, Arthur David (NIH/NCI)
olsona at dc37a.nci.nih.gov
Mon Jan 26 16:02:53 UTC 2004
Mok Ly Yng is not on the time zone mailing list; direct replies
appropriately.
--ado
-----Original Message-----
From: Mok Ly Yng [mailto:lymok at starhub.net.sg]
Sent: Friday, January 23, 2004 9:01 AM
To: tz at lecserver.nci.nih.gov
Subject: Time Zone: Malaysia & Singapore
Hi there,
I am Mok Ly Yng. I found my name mentioned in the latest version of the tz
data file. I have added a few other points to the Malaysia and Singapore
time zone info. These are marked in blue.
For both Malaysia and Singapore, for many years in the past versions of this
file, the first date was listed as 'Until 1880'. This was the date which
prompted my research into the history of legal time in Singapore and
Malaysia. It turned out that '1880' was the founding year of Kuala Lumpur.
So, it could not have been an 'Until' date.
Kuala Lumpur kept its own Local Mean Time of 6:46:46 until it was changed to
Singapore's Mean Time on 01 Jan 1901, along with the rest of the other Malay
States under British rule. The difference of 2 sec between 6:46:46 and
6:46:48 (as in the original version) was probably due to the rounding off of
arc seconds in the longitude value.
Singapore was founded in 1819 and had kept different local mean times
depending on the different longitude values as determined by different
authorities over the years.
The only uncertainty remaining is the WWII years of 1942-1945. I am still
trying to find out the exact dates of time changes.
Regards,
Mok
==========
# @(#)asia 7.73
# Malaysia
# Rule NAME FROM TO TYPE IN ON AT SAVE
LETTER/S
Rule NBorneo 1935 1941 - Sep 14 0:00 0:20 TS #
one-Third Summer
Rule NBorneo 1935 1941 - Dec 14 0:00 0 -
#
# peninsular Malaysia
# From Paul Eggert (2003-11-01):
# The data here are taken from Mok Ly Yng (2003-10-30)
# <http://www.math.nus.edu.sg/aslaksen/teaching/timezone.html
<http://www.math.nus.edu.sg/aslaksen/teaching/timezone.html> >.
# Before 1901, Penang, Malacca and Singapore each had their own time zone;
# assume Kuala Lumpur used Malaccan time.
[This did not happen. K.L. had its own L.M.T. of 6:46:46 from GMT.]
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Kuala_Lumpur 6:46:46 - LMT 1901 Jan 1 # K.L. Local
Mean Time
6:55:25 - SMT 1905 Jun 1 # Singapore M.T.
7:00 - MALT 1933 Jan 1 # Malaya Time
7:00 0:20 MALST 1936 Jan 1
7:20 - MALT 1941 Sep 1
7:30 - MALT 1942 Feb 16
9:00 - JST 1945 Sep 12
7:30 - MALT 1982 Jan 1
8:00 - MYT # Malaysia Time
# Singapore
# The data here are taken from Mok Ly Yng (2003-10-30)
# <http://www.math.nus.edu.sg/aslaksen/teaching/timezone.html
<http://www.math.nus.edu.sg/aslaksen/teaching/timezone.html> >.
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Asia/Singapore 6:55:25 - LMT 1901 Jan 1 # Local Mean
Time
6:55:25 - SMT 1905 Jun 1 # Singapore M.T.
7:00 - MALT 1933 Jan 1 # Malaya Time
7:00 0:20 MALST 1936 Jan 1
7:20 - MALT 1941 Sep 1
7:30 - MALT 1942 Feb 16
9:00 - JST 1945 Sep 12
7:30 - MALT 1965 Aug 9 # independence
7:30 - SGT 1982 Jan 1 # Singapore Time
8:00 - SGT
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