From 316c1598e166e15c27fe611cacd81aeada2a836d Mon Sep 17 00:00:00 2001 From: Tim Parenti Date: Thu, 10 Dec 2020 22:39:46 -0500 Subject: Correct LMT and pre-1919 transitions for Nigeria (Thanks to P Chan.) * NEWS: Mention this. * africa (Africa/Lagos): Move LMT 1 s west; add several pre-1919 transitions with references. --- NEWS | 2 ++ africa | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++- 2 files changed, 64 insertions(+), 1 deletion(-) diff --git a/NEWS b/NEWS index 041d224..991b737 100644 --- a/NEWS +++ b/NEWS @@ -18,6 +18,8 @@ Unreleased, experimental changes - Ghana: several 1915 through 1956 transitions - Israel and Palestine: several 1940 through 1985 transitions - Kenya and adjacent: several 1908 through 1960 transitions + - Nigeria and adjacent: correcting LMT in Lagos, and several 1905 + through 1919 transitions - Seychelles: the introduction of standard time in 1907, not 1906 - Vanuatu: DST in 1973-1974, and a corrected 1984 transition (Thanks to P Chan.) diff --git a/africa b/africa index e0200a9..59cf501 100644 --- a/africa +++ b/africa @@ -1318,8 +1318,69 @@ Zone Africa/Windhoek 1:08:24 - LMT 1892 Feb 8 # See Africa/Lagos. # Nigeria + +# From P Chan (2020-12-03): +# GMT was adopted as the standard time of Lagos on 1905-07-01. +# Lagos Weekly Record, 1905-06-24, p 3 +# http://ddsnext.crl.edu/titles/31558#?c=0&m=668&s=0&cv=2&r=0&xywh=1446%2C5221%2C1931%2C1235 +# says "It is officially notified that on and after the 1st of July 1905 +# Greenwich Mean Solar Time will be adopted thought the Colony and +# Protectorate, and that it will be necessary to put all clocks 13 minutes and +# 35 seconds back, recording local mean time." +# +# It seemed that Lagos returned to LMT on 1908-07-01. +# [The Lagos Standard], 1908-07-01, p 5 +# http://ddsnext.crl.edu/titles/31556#?c=0&m=78&s=0&cv=4&r=0&xywh=-92%2C3590%2C3944%2C2523 +# says "Scarcely have the people become accustomed to this new time, when +# another official notice has now appeared announcing that from and after the +# 1st July next, return will be made to local mean time." +# +# From P Chan (2020-11-27): +# On 1914-01-01, standard time of GMT+0:30 was adopted for the unified Nigeria. +# Colonial Reports - Annual. No. 878. Nigeria. Report for 1914. (April 1916), +# p 27 +# https://libsysdigi.library.illinois.edu/ilharvest/Africana/Books2011-05/3064634/3064634_1914/3064634_1914_opt.pdf#page=27 +# "On January 1st [1914], a universal standard time for Nigeria was adopted, +# viz., half an hour fast on Greenwich mean time, corresponding to the meridian +# 7 [degrees] 30' E. long." +# Lloyd's Register of Shipping (1915) says "Hitherto the time observed in Lagos +# was the local mean time. On 1st January, 1914, standard time for the whole of +# Nigeria was introduced ... Lagos time has been advanced about 16 minutes +# accordingly." +# +# In 1919, standard time was changed to GMT+1. +# Interpretation Ordinance (Cap 2) +# The Laws of Nigeria, Containing the Ordinances of Nigeria, in Force on the +# 1st Day of January, 1923, Vol.I [p 16] +# https://books.google.com/books?id=BOMrAQAAMAAJ&pg=PA16 +# "The expression 'Standard time' means standard time as used in Nigeria: +# namely, 60 minutes in advance of Greenwich mean time. (As amended by 18 of +# 1919, s. 2.)" +# From Tim Parenti (2020-12-10): +# The Lagos Weekly Record, 1919-09-20, p 3 details discussion on the first +# reading of this Bill by the Legislative Council of the Colony of Nigeria on +# Thursday 1919-08-28: +# http://ddsnext.crl.edu/titles/31558?terms&item_id=303484#?m=1118&c=1&s=0&cv=2&r=0&xywh=1261%2C3408%2C2994%2C1915 +# "The proposal is that the Globe should be divided into twelve zones East and +# West of Greenwich, of one hour each, Nigeria falling into the zone with a +# standard of one hour fast on Greenwich Mean Time. Nigeria standard time is +# now 30 minutes in advance of Greenwich Mean Time ... according to the new +# proposal, standard time will be advanced another 30 minutes". It was further +# proposed that the firing of the time guns likewise be adjusted by 30 minutes +# to compensate. +# From Tim Parenti (2020-12-10), per P Chan (2020-12-11): +# The text of Ordinance 18 of 1919, published in Nigeria Gazette, Vol 6, No 52, +# shows that the change was assented to the following day and took effect "on +# the 1st day of September, 1919." +# Nigeria Gazette and Supplements 1919 Jan-Dec, Reference: 73266B-40, +# img 245-246 +# https://microform.digital/boa/collections/77/volumes/539/nigeria-lagos-1887-1919 + # Zone NAME STDOFF RULES FORMAT [UNTIL] -Zone Africa/Lagos 0:13:36 - LMT 1919 Sep +Zone Africa/Lagos 0:13:35 - LMT 1905 Jul 1 + 0:00 - GMT 1908 Jul 1 + 0:13:35 - LMT 1914 Jan 1 + 0:30 - +0030 1919 Sep 1 1:00 - WAT Link Africa/Lagos Africa/Bangui # Central African Republic Link Africa/Lagos Africa/Brazzaville # Rep. of the Congo -- 2.15.1