Re: Daylight Saving Time: Clarification and commentary Message #6 Posted by Karl Schneider on 9 Mar 2009, 1:20 a.m., in response to message #3 by Bob Patton
Quote:
In program EDST: Daylight Savings...
First, several clarifications:
1. In the US, the term is Daylight Saving Time (not "Savings").
2. DST in the Eastern Time Zone is abbreviated "EDT". "EDST" would cause ambiguity with Standard Time (EST), and looks like a typo, since "D" and "S" are adjacent to each other on the standard keyboard.
The calendar extension of Daylight Saving Time several years ago in the US was largely a gimmick, as far as I'm concerned -- a so-called "energy-saving" measure that doesn't require any real sacrifice or commitment to save energy.
From Winter 1940-July 1945 during WWII, Great Britain observed year-round "Summer Time" DST, and a 2-hour-advanced British Double Summer Time during the summers. This actually made sense, as a significant proportion of electrical load was incandescent lighting, and the advanced clock helped to better match daylight hours to people's waking hours. This also lessened the impact of summer blackouts intended to discourage nighttime air raids.
In the US, however, the average climate is considerably warmer. In this era, lighting typically is efficient fluorescent and a significant proportion of electrical load is air conditioning -- both at home and in the workplace or school. In the heart of summer, keeping people awake and active during the warmer evening hours, instead of the cooler morning hours, does not necessarily save energy. This is why hot-climate Arizona (outside of Navajo Nation) does not observe DST.
-- KS
Edited: 9 Mar 2009, 4:00 p.m. after one or more responses were posted
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