From 6982e34ab92cf13f3f3fb20212aca8aa2e4f0aae Mon Sep 17 00:00:00 2001 From: Tim Parenti Date: Tue, 2 Mar 2021 19:33:42 -0500 Subject: Sierra Leone did not use DST 1957-1962 (Thanks to P Chan.) * NEWS: Mention this. * backzone (SL): Remove rogue entries from Shanks & Pottenger. --- NEWS | 3 ++- backzone | 24 +++++++++++++++++++----- 2 files changed, 21 insertions(+), 6 deletions(-) diff --git a/NEWS b/NEWS index e5d22f8..6b90005 100644 --- a/NEWS +++ b/NEWS @@ -15,7 +15,8 @@ Unreleased, experimental changes Additional fixes to entries in the 'backzone' file include: - Gambia: 1933 and 1942 transitions - Malawi: several 1911 through 1925 transitions - - Sierra Leone: several 1913 through 1941 transitions + - Sierra Leone: several 1913 through 1941 transitions, and DST + was NOT observed in 1957 through 1962 (Thanks to Alois Treindl and P Chan.) Changes to code diff --git a/backzone b/backzone index acaca55..9ebf9d2 100644 --- a/backzone +++ b/backzone @@ -182,16 +182,30 @@ Zone Africa/Douala 0:38:48 - LMT 1912 # 1941), 1914-12-04 # Alteration of Time (Amendment) Ordinance, 1946 (No. 2 of 1946) [1946-02-07] -# From Tim Parenti (2021-02-20), per Paul Eggert (2014-08-12): -# We retain the 1957 through 1962 transitions from Shanks & Pottenger since we -# have no better data there. +# From Tim Parenti (2021-03-02), per P Chan (2021-02-25): +# For Sierra Leone in 1957-1962, the standard time was defined in the +# Alteration of Time Ordinance, 1932 (as amended in 1946, renamed to Local Time +# Ordinance in 1960 and Local Time Act in 1961). It was unamended throughout +# that period. See references to "Time" in the Alphabetical Index of the +# Legislation in force on the 31st day of December, +# 1957: https://books.google.com/books?id=lvQ-AQAAIAAJ&pg=RA2-PA49 +# 1958: https://books.google.com/books?id=4fQ-AQAAIAAJ&pg=RA2-PA50 +# 1959: https://books.google.com/books?id=p_U-AQAAIAAJ&pg=RA2-PA55 +# 1960: https://books.google.com/books?id=JPY-AQAAIAAJ&pg=RA3-PA37 +# 1961: https://books.google.com/books?id=7vY-AQAAIAAJ&pg=RA3-PA41 +# 1962: https://books.google.com/books?id=W_c-AQAAIAAJ&pg=RA3-PA44 +# 1963: https://books.google.com/books?id=9vk-AQAAIAAJ&pg=RA1-PA47 +# +# Although Shanks & Pottenger had DST from Jun 1 00:00 to Sep 1 00:00 in this +# period, many contemporaneous almanacs agree that it wasn't used: +# https://mm.icann.org/pipermail/tz/2021-February/029866.html +# Go with the above. + # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule SL 1932 only - Dec 1 0:00 0:20 -0040 Rule SL 1933 1938 - Mar 31 24:00 0 -01 Rule SL 1933 1939 - Aug 31 24:00 0:20 -0040 Rule SL 1939 only - May 31 24:00 0 -01 -Rule SL 1957 1962 - Jun 1 0:00 1:00 +01 -Rule SL 1957 1962 - Sep 1 0:00 0 GMT Zone Africa/Freetown -0:53:00 - LMT 1882 -0:53:00 - FMT 1913 Jul 1 # Freetown MT -1:00 SL %s 1939 Sep 5 -- 2.15.1