From 65b77efd4ea623082dfb139c9c41c4e1f7762d44 Mon Sep 17 00:00:00 2001 From: Paul Eggert Date: Sat, 20 Aug 2016 09:58:36 -0700 Subject: [PROPOSED PATCH] Revert 1949 transition for Los Angeles * NEWS, northamerica (CA): Revert January 1949 change; appparently Shanks was right after all. (Thanks to David Cochrane and Steve Allen.) --- NEWS | 3 +-- northamerica | 22 ++++++++++++---------- 2 files changed, 13 insertions(+), 12 deletions(-) diff --git a/NEWS b/NEWS index a8479eb..e8fabe7 100644 --- a/NEWS +++ b/NEWS @@ -11,8 +11,7 @@ Unreleased, experimental changes For America/Los_Angeles, spring-forward transition times have been corrected from 02:00 to 02:01 in 1948, and from 02:00 to 01:00 in - 1950-1966. The fall-back transition date for early 1949 has been - corrected from 1949-01-01 to 1949-01-16. + 1950-1966. Changes affecting code diff --git a/northamerica b/northamerica index c9c2061..d66135e 100644 --- a/northamerica +++ b/northamerica @@ -414,20 +414,19 @@ Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 # Nevada (except West Wendover), Oregon (except the northern 3/4 of # Malheur county), and Washington -# From Paul Eggert (2016-08-19): -# In 1948 California had an electricity shortage. To save electricity, -# in early February PG&E changed power frequency from 60 to 59.5 Hz during -# daylight hours, causing electric clocks to lose six minutes per day. -# (This did not change legal time, and is not part of the data here.) -# See: Ross SA. An energy crisis from the past: Northern California in 1948. -# Working Paper No. 8, Institute of Governmental Studies, UC Berkeley, 1973-11. -# http://escholarship.org/uc/item/8x22k30c +# From Paul Eggert (2016-08-20): +# In early February 1948, in response to California's electricity shortage, +# PG&E changed power frequency from 60 to 59.5 Hz during daylight hours, +# causing electric clocks to lose six minutes per day. (This did not change +# legal time, and is not part of the data here.) See: +# Ross SA. An energy crisis from the past: Northern California in 1948. +# Working Paper No. 8, Institute of Governmental Studies, UC Berkeley, +# 1973-11. http://escholarship.org/uc/item/8x22k30c # # In another measure to save electricity, DST was instituted from 1948-03-14 # at 02:01 to 1949-01-16 at 02:00, with the governor having the option to move # the fallback transition earlier. See pages 3-4 of: # http://clerk.assembly.ca.gov/sites/clerk.assembly.ca.gov/files/archive/Statutes/1948/48Vol1_Chapters.pdf -# Apparently the governor did not exercise the option. # # In response: # @@ -436,6 +435,9 @@ Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 # factor in the defeat of the Dewey-Warren Presidential ticket in California. # -- Ross, p 25 # +# On December 8 the governor exercised the option, setting the date to January 1 +# (LA Times 1948-12-09). The transition time was 02:00 (LA Times 1949-01-01). +# # Despite the controversy, in 1949 California voters approved Proposition 12, # which established DST from April's last Sunday at 01:00 until September's # last Sunday at 02:00. This was amended by 1962's Proposition 6, which changed @@ -445,7 +447,7 @@ Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 # # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule CA 1948 only - Mar 14 2:01 1:00 D -Rule CA 1949 only - Jan 16 2:00 0 S +Rule CA 1949 only - Jan 1 2:00 0 S Rule CA 1950 1966 - Apr lastSun 1:00 1:00 D Rule CA 1950 1961 - Sep lastSun 2:00 0 S Rule CA 1962 1966 - Oct lastSun 2:00 0 S -- 2.7.4