Daylight Saving Time
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Daylight Saving Time
Daylight Saving Time Beth Cook Information Research Specialist March 9, 2016 Congressional Research Service 7-5700 www.crs.gov R44411 Daylight Saving Time Summary Daylight Saving Time (DST) is a period of the year between spring and fall when clocks in the United States are set one hour ahead of standard time. DST is currently observed in the United States from 2:00 a.m. on the second Sunday in March until 2:00 a.m. on the first Sunday in November. The following states and territories do not observe DST: Arizona (except the Navajo Nation, which does observe DST), Hawaii, American Samoa, Guam, the Northern Mariana Islands, Puerto Rico, and the Virgin Islands. Congressional Research Service Daylight Saving Time Contents When and Why Was Daylight Saving Time Enacted? .................................................................... 1 Has the Law Been Amended Since Inception? ................................................................................ 2 Which States and Territories Do Bot Observe DST? ...................................................................... 2 What Other Countries Observe DST? ............................................................................................. 2 Which Federal Agency Regulates DST in the United States? ......................................................... 3 How Does an Area Move on or off DST? ....................................................................................... 3 How Can States and Territories Change an Area’s Time Zone? ..................................................... -
Daylight Saving Time (DST)
Daylight Saving Time (DST) Updated September 30, 2020 Congressional Research Service https://crsreports.congress.gov R45208 Daylight Saving Time (DST) Summary Daylight Saving Time (DST) is a period of the year between spring and fall when clocks in most parts of the United States are set one hour ahead of standard time. DST begins on the second Sunday in March and ends on the first Sunday in November. The beginning and ending dates are set in statute. Congressional interest in the potential benefits and costs of DST has resulted in changes to DST observance since it was first adopted in the United States in 1918. The United States established standard time zones and DST through the Calder Act, also known as the Standard Time Act of 1918. The issue of consistency in time observance was further clarified by the Uniform Time Act of 1966. These laws as amended allow a state to exempt itself—or parts of the state that lie within a different time zone—from DST observance. These laws as amended also authorize the Department of Transportation (DOT) to regulate standard time zone boundaries and DST. The time period for DST was changed most recently in the Energy Policy Act of 2005 (EPACT 2005; P.L. 109-58). Congress has required several agencies to study the effects of changes in DST observance. In 1974, DOT reported that the potential benefits to energy conservation, traffic safety, and reductions in violent crime were minimal. In 2008, the Department of Energy assessed the effects to national energy consumption of extending DST as changed in EPACT 2005 and found a reduction in total primary energy consumption of 0.02%. -
Impact of Extended Daylight Saving Time on National Energy Consumption
Impact of Extended Daylight Saving Time on National Energy Consumption TECHNICAL DOCUMENTATION FOR REPORT TO CONGRESS Energy Policy Act of 2005, Section 110 Prepared for U.S. Department of Energy Office of Energy Efficiency and Renewable Energy By David B. Belzer (Pacific Northwest National Laboratory), Stanton W. Hadley (Oak Ridge National Laboratory), and Shih-Miao Chin (Oak Ridge National Laboratory) October 2008 U.S. Department of Energy Energy Efficiency and Renewable Energy Page Intentionally Left Blank Acknowledgements The Department of Energy (DOE) acknowledges the important contributions made to this study by the principal investigators and primary authors—David B. Belzer, Ph.D (Pacific Northwest National Laboratory), Stanton W. Hadley (Oak Ridge National Laboratory), and Shih-Miao Chin, Ph.D (Oak Ridge National Laboratory). Jeff Dowd (DOE Office of Energy Efficiency and Renewable Energy) was the DOE project manager, and Margaret Mann (National Renewable Energy Laboratory) provided technical and project management assistance. Two expert panels provided review comments on the study methodologies and made important and generous contributions. 1. Electricity and Daylight Saving Time Panel – technical review of electricity econometric modeling: • Randy Barcus (Avista Corp) • Adrienne Kandel, Ph.D (California Energy Commission) • Hendrik Wolff, Ph.D (University of Washington) 2. Transportation Sector Panel – technical review of analytical methods: • Harshad Desai (Federal Highway Administration) • Paul Leiby, Ph.D (Oak Ridge National Laboratory) • John Maples (DOE Energy Information Administration) • Art Rypinski (Department of Transportation) • Tom White (DOE Office of Policy and International Affairs) The project team also thanks Darrell Beschen (DOE Office of Energy Efficiency and Renewable Energy), Doug Arent, Ph.D (National Renewable Energy Laboratory), and Bill Babiuch, Ph.D (National Renewable Energy Laboratory) for their helpful management review. -
Bill Analysis
HOUSE OF REPRESENTATIVES FINAL BILL ANALYSIS BILL #: HB 1013 FINAL HOUSE FLOOR ACTION: SUBJECT/SHORT Daylight Saving Time 103 Y’s 11 N’s TITLE SPONSOR(S): Nuñez; Fitzenhagen and others GOVERNOR’S Approved ACTION: COMPANION CS/CS/SB 858 BILLS: SUMMARY ANALYSIS HB 1013 passed the House on February 14, 2018, and subsequently passed the Senate on March 6, 2018. The bill declares the Legislature’s intent to observe Daylight Saving Time year-round throughout the entire state if federal law is amended to permit states to take such action. The bill does not appear to have a fiscal impact. The bill was approved by the Governor on March 23, 2018, ch. 2018-99, L.O.F., and will become effective on July 1, 2018. This document does not reflect the intent or official position of the bill sponsor or House of Representatives. STORAGE NAME: h1013z1.LFV.docx DATE: March 28, 2018 I. SUBSTANTIVE INFORMATION A. EFFECT OF CHANGES: Present Situation The Standard Time Act of 1918 In 1918, the United States enacted the Standard Time Act, which adopted a national standard measure of time, created five standard time zones across the continental U.S., and instituted Daylight Saving Time (DST) nationwide as a war effort during World War I.1 DST advanced standard time by one hour from the last Sunday in March to the last Sunday in October.2 DST was repealed after the war but the standard time provisions remained in place.3 During World War II, a national DST standard was revived and extended year-round from 1942 to 1945.4 Uniform Time Act of 1966 Following World War -
Page 584 TITLE 15—COMMERCE and TRADE § 260A §260A
§ 260a TITLE 15—COMMERCE AND TRADE Page 584 EFFECTIVE DATE AMENDMENTS Pub. L. 89–387, § 6, Apr. 13, 1966, 80 Stat. 108, provided 2005—Subsec. (a). Pub. L. 109–58 substituted ‘‘second that: ‘‘This Act [enacting this section and sections Sunday of March’’ for ‘‘first Sunday of April’’ and 260a, 266, and 267 of this title and amending sections 261 ‘‘first Sunday of November’’ for ‘‘last Sunday of Octo- to 263 of this title] shall take effect on April 1, 1967; ex- ber’’. cept that if any State, the District of Columbia, the 1986—Subsec. (a). Pub. L. 99–359 substituted ‘‘first Commonwealth of Puerto Rico, or any possession of the Sunday of April’’ for ‘‘last Sunday of April’’. United States, or any political subdivision thereof, ob- 1983—Subsec. (c). Pub. L. 97–449 substituted ‘‘Sec- serves daylight saving time in the year 1966, such time retary of Transportation or his’’ for ‘‘Interstate Com- shall advance the standard time otherwise applicable in merce Commission or its’’. such place by one hour and shall commence at 2 o’clock 1972—Subsec. (a). Pub. L. 92–267 authorized any State antemeridian on the last Sunday in April of the year with parts thereof lying in more than one time zone to 1966 and shall end at 2 o’clock antemeridian on the last exempt by law that part of such State lying within any Sunday in October of the year 1966.’’ time zone from provisions of this subsection providing for advancement of time. SHORT TITLE EFFECTIVE DATE OF 2005 AMENDMENT Pub. L. -
49 CFR Subtitle a (10–1–10 Edition) § 71.1
§ 71.1 49 CFR Subtitle A (10–1–10 Edition) 71.6 Central zone. § 71.2 Annual advancement of stand- 71.7 Boundary line between central and ard time. mountain zones. 71.8 Mountain zone. (a) The Uniform Time Act of 1966 (15 71.9 Boundary line between mountain and U.S.C. 260a(a)), as amended, requires Pacific zones. that the standard time of each State 71.10 Pacific zone. observing Daylight Saving Time shall 71.11 Alaska zone. be advanced 1 hour beginning at 2:00 71.12 Hawaii-Aleutian zone. 71.13 Samoa zone. a.m. on the first Sunday in April of 71.14 Chamorro Zone. each year and ending on the last Sun- day in October. This advanced time AUTHORITY: Secs. 1–4, 40 Stat. 450, as amended; sec. 1, 41 Stat. 1446, as amended; shall be the standard time of each zone secs. 2–7, 80 Stat. 107, as amended; 100 Stat. during such period. The Act authorizes 764; Act of Mar. 19, 1918, as amended by the any State to exempt itself from this re- Uniform Time Act of 1966 and Pub. L. 97–449, quirement. States in two or more time 15 U.S.C. 260–267; Pub. L. 99–359; Pub. L. 106– zones may exempt the easternmost 564, 15 U.S.C. 263, 114 Stat. 2811; 49 CFR time zone portion from this require- 1.59(a), unless otherwise noted. ment. SOURCE: Amdt. 71–11, 35 FR 12318, Aug. 1, (b) Section 3(b) of the Uniform Time 1970, unless otherwise noted. -
612 Part 71—Standard Time Zone Boundaries
§ 41.125 49 CFR Subtitle A (10±1±96 Edition) the BOCA National and SBCC Standard the Stafford Act after a Presidentially building codes. The seismic zone map declared major disaster or emergency in the ICBO Uniform Building Code is when assistance actions involve new also based on one of the USGS maps of construction or total replacement of a horizontal ground acceleration. How- building. ever, the ICBO map should be used only with the ICBO code. Also, it is not ap- § 41.125 Judicial review. propriate to use the NEHRP maps with Nothing in this part is intended to the ICBO Uniform Building Code, be- create any right or benefit, substantive cause the design requirements of build- or procedural, enforceable at law by a ing codes are keyed to the numerical party against the DOT, its Operating values of the map they reference. Administrations, its officers, or any (c) Revisions to the model codes list- person. ed in paragraph (b) of this section that are substantially equivalent to or ex- ceed the then current or immediately PART 71ÐSTANDARD TIME ZONE preceding edition of the NEHRP rec- BOUNDARIES ommended provisions, as it is updated, may be approved by a DOT Operating Sec. Administration to meet the require- 71.1 Limits defined; exceptions authorized ments in this part. for certain rail operating purposes only. (d) State, county, local, or other ju- 71.2 Annual advancement of standard time. risdictional building ordinances adopt- 71.3 Atlantic zone. 71.4 Eastern zone. ing and enforcing the model codes, list- 71.5 Boundary line between eastern and ed in paragraph (b) of this section, in central zones. -
Standard Time Zones
APPENDIX B Standard Time Zones Table B-1 lists all the standard time zones that you can configure on an MDE and the offset from Coordinated Universal Time (UTC) for each standard time zone. The offset (ahead or behind) UTC in hours, as displayed in Table B-1, is in effect during winter time. During summer time or daylight saving time, the offset may be different from the values in the table and are calculated and displayed accordingly by the system clock. Note The time zone entry is case sensitive and must be specified in the exact notation listed in the following time zone table. When you use a time zone entry from the following time zone table, the system is automatically adjusted for daylight saving time. Table B-1 List of Standard Time Zones and Offsets from UTC Time Zone Offset from UTC Africa/Abidjan 0 Africa/Accra 0 Africa/Addis_Ababa +3 Africa/Algiers +1 Africa/Asmera +3 Africa/Bamako 0 Africa/Bangui +1 Africa/Banjul 0 Africa/Bissau 0 Africa/Blantyre +2 Africa/Brazzaville +1 Africa/Bujumbura +2 Africa/Cairo +2 Africa/Casablanca 0 Africa/Ceuta +1 Africa/Conakry 0 Africa/Dakar 0 Africa/Dar_es_Salaam +3 B-1 Appendix B Standard Time Zones Table B-1 List of Standard Time Zones and Offsets from UTC (continued) Time Zone Offset from UTC Africa/Djibouti +3 Africa/Douala +3 Africa/El_Aaiun +1 Africa/Freetown 0 Africa/Gaborone +2 Africa/Harare +2 Africa/Johannesburg +2 Africa/Kampala +3 Africa/Khartoum +3 Africa/Kigali +2 Africa/Kinshasa +1 Africa/Lagos +1 Africa/Libreville +1 Africa/Lome 0 Africa/Luanda +1 Africa/Lubumbashi +2 Africa/Lusaka -
Time Signal Stations 1By Michael A
122 Time Signal Stations 1By Michael A. Lombardi I occasionally talk to people who can’t believe that some radio stations exist solely to transmit accurate time. While they wouldn’t poke fun at the Weather Channel or even a radio station that plays nothing but Garth Brooks records (imagine that), people often make jokes about time signal stations. They’ll ask “Doesn’t the programming get a little boring?” or “How does the announcer stay awake?” There have even been parodies of time signal stations. A recent Internet spoof of WWV contained zingers like “we’ll be back with the time on WWV in just a minute, but first, here’s another minute”. An episode of the animated Power Puff Girls joined in the fun with a skit featuring a TV announcer named Sonny Dial who does promos for upcoming time announcements -- “Welcome to the Time Channel where we give you up-to- the-minute time, twenty-four hours a day. Up next, the current time!” Of course, after the laughter dies down, we all realize the importance of keeping accurate time. We live in the era of Internet FAQs [frequently asked questions], but the most frequently asked question in the real world is still “What time is it?” You might be surprised to learn that time signal stations have been answering this question for more than 100 years, making the transmission of time one of radio’s first applications, and still one of the most important. Today, you can buy inexpensive radio controlled clocks that never need to be set, and some of us wear them on our wrists. -
STANDARD FREQUENCIES and TIME SIGNALS (Question ITU-R 106/7) (1992-1994-1995) Rec
Rec. ITU-R TF.768-2 1 SYSTEMS FOR DISSEMINATION AND COMPARISON RECOMMENDATION ITU-R TF.768-2 STANDARD FREQUENCIES AND TIME SIGNALS (Question ITU-R 106/7) (1992-1994-1995) Rec. ITU-R TF.768-2 The ITU Radiocommunication Assembly, considering a) the continuing need in all parts of the world for readily available standard frequency and time reference signals that are internationally coordinated; b) the advantages offered by radio broadcasts of standard time and frequency signals in terms of wide coverage, ease and reliability of reception, achievable level of accuracy as received, and the wide availability of relatively inexpensive receiving equipment; c) that Article 33 of the Radio Regulations (RR) is considering the coordination of the establishment and operation of services of standard-frequency and time-signal dissemination on a worldwide basis; d) that a number of stations are now regularly emitting standard frequencies and time signals in the bands allocated by this Conference and that additional stations provide similar services using other frequency bands; e) that these services operate in accordance with Recommendation ITU-R TF.460 which establishes the internationally coordinated UTC time system; f) that other broadcasts exist which, although designed primarily for other functions such as navigation or communications, emit highly stabilized carrier frequencies and/or precise time signals that can be very useful in time and frequency applications, recommends 1 that, for applications requiring stable and accurate time and frequency reference signals that are traceable to the internationally coordinated UTC system, serious consideration be given to the use of one or more of the broadcast services listed and described in Annex 1; 2 that administrations responsible for the various broadcast services included in Annex 2 make every effort to update the information given whenever changes occur. -
SUNDIALS \0> E O> Contents Page
REG: HER DEPARTMENT OF COMMERCE Letter 1 1-3 BUREAU OF STANDARDS Circular WASHINGTON LC 3^7 (October Jl., 1932) Prepared by R. E. Gould, Chief, Time Section ^ . fA SUNDIALS \0> e o> Contents Page I. Introduction „ 2 II. Corrections to be applied 2 1. Equation of time 3 III. Construction 4 1. Materials and foundation 4 2. Graphical construction for a horizontal sundial 4 3. Gnomon . 5 4. Mathematical construction ........ 6 5,. Illustrations Fig. 1. Layout of a dial 7 Fig. 2. Suggested forms g IV. Setting up the dial 9 V. Mottoes q VI. Bibliography -10 . , 2 I. Introduction One of the earliest methods of determining time was by observing the position of the shadow cast by an object placed in the sunshine. As the day advances the shadow changes and its position at any instant gives an indication of the time. The relative length of the shadow at midday can also be used to indicate the season of the year. It is thought that one of the purposes of the great pyramids of Egypt was to indicate the time of day and the progress of the seasons. Although the origin of the sundial is very obscure, it is known to have been used in very early times in ancient Babylonia. One of the earliest recorded is the Dial of Ahaz 0th Century, B. C. mentioned in the Bible, II Kings XX: 0-11. , The Greeks used sundials in the 4th Century B. C. and one was set up in Rome in 233 B. C. Today sundials are used largely for decorative purposes in gardens or on lawns, and many inquiries have reached the Bureau of Standards regarding the construction and erection of such dials. -
Atomix Atomic Clock 00562 Instructions
Atomix Atomic Clock Model 00562 About the Atomic Clock The National Institute of Standard and Technology (NIST) in Fort Collins, Colorado broadcasts the time signal (WWVB at 60 kHz AM radio signal) with an accuracy of 1 second per every 3,000 years. The signal is able to cover a distance of up to 2,000 miles from the source. Like a typical AM radio, your atomic clock will not be able to receive the WWVB signal in places surrounded by heavy concrete or metal panels. The reception of the time signal is also greatly affected by electrical or electronic interference. To get the best performance from the atomic clock, install the clock nearer to a window facing west. Battery Installation and Set Up Remove the battery cover and insert 2 “AA” alkaline batteries according to the direction shown inside the battery compartment. Once the batteries are installed the display will show all segments of the LCD display for 3 seconds and will beep once. Then the display will show 12:00pm Jan 1, 2000 together with room temperature. The Time Zone is defaulted at PST – Pacific Standard Time. Select the correct Timer Zone 1. Press the ZONE / DST button to select PST, MST, CST or EST. 2. Once a time zone is selected, your Atomix clock will start searching for the time signal. 3. While your Atomix clock is seeking the signal, the signal strength icon will change gradually indicating the search is continuing. 4. If the signal is available, your Atomix clock will display the local time in about 3-5 minutes.