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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? ..................................................... -
Mike Zornek • March 2020
Working with Time Zones Inside a Phoenix App Mike Zornek • March 2020 Terminology Layers of Wall Time International Atomic Time (ITA) Layers of Wall Time Universal Coordinated Time (UTC) International Atomic Time (ITA) Layers of Wall Time Universal Coordinated Time (UTC) Leap Seconds International Atomic Time (ITA) Layers of Wall Time Standard Time Universal Coordinated Time (UTC) Leap Seconds International Atomic Time (ITA) Layers of Wall Time Standard Time Time Zone UTC Offset Universal Coordinated Time (UTC) Leap Seconds International Atomic Time (ITA) Layers of Wall Time Wall Time Standard Time Time Zone UTC Offset Universal Coordinated Time (UTC) Leap Seconds International Atomic Time (ITA) Layers of Wall Time Wall Time Standard Offset Standard Time Time Zone UTC Offset Universal Coordinated Time (UTC) Leap Seconds International Atomic Time (ITA) Things Change Wall Time Standard Offset Politics Standard Time Time Zone UTC Offset Politics Universal Coordinated Time (UTC) Leap Seconds Celestial Mechanics International Atomic Time (ITA) Things Change Wall Time Standard Offset changes ~ 2 / year Standard Time Time Zone UTC Offset changes ~ 10 / year Universal Coordinated Time (UTC) 27 changes so far Leap Seconds last was in Dec 2016 ~ 37 seconds International Atomic Time (ITA) "Time Zone" How Elixir Represents Time Date Time year hour month minute day second nanosecond NaiveDateTime Date Time year hour month minute day second nanosecond DateTime time_zone NaiveDateTime utc_offset std_offset zone_abbr Date Time year hour month minute day second -
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%. -
2017 Procedure-Specific Measure Updates and Specifications Report Hospital-Level Risk-Standardized Complication Measure
2017 Procedure-Specific Measure Updates and Specifications Report Hospital-Level Risk-Standardized Complication Measure Elective Primary Total Hip Arthroplasty (THA) and/or Total Knee Arthroplasty (TKA) – Version 6.0 Submitted By: Yale New Haven Health Services Corporation/Center for Outcomes Research & Evaluation (YNHHSC/CORE) Prepared For: Centers for Medicare & Medicaid Services (CMS) March 2017 Table of Contents LIST OF TABLES ..................................................................................................................................3 LIST OF FIGURES .................................................................................................................................4 1. HOW TO USE THIS REPORT ............................................................................................................6 2. BACKGROUND AND OVERVIEW OF MEASURE METHODOLOGY .......................................................7 2.1 Background on the Complication Measure ........................................................................ 7 2.2 Overview of Measure Methodology ................................................................................... 7 2.2.1 Cohort ...................................................................................................................... 7 2.2.2 Outcome .................................................................................................................. 9 2.2.3 Risk-Adjustment Variables.................................................................................... -
Operation Guide 3448
MO1611-EA © 2016 CASIO COMPUTER CO., LTD. Operation Guide 3448 ENGLISH Congratulations upon your selection of this CASIO watch. Warning ! • The measurement functions built into this watch are not intended for taking measurements that require professional or industrial precision. Values produced by this watch should be considered as reasonable representations only. • Note that CASIO COMPUTER CO., LTD. assumes no responsibility for any damage or loss suffered by you or any third party arising through the use of your watch or its malfunction. E-1 About This Manual • Keep the watch away from audio speakers, magnetic necklaces, cell phones, and other devices that generate strong magnetism. Exposure to strong • Depending on the model of your watch, display text magnetism can magnetize the watch and cause incorrect direction readings. If appears either as dark figures on a light background, or incorrect readings continue even after you perform bidirectional calibration, it light figures on a dark background. All sample displays could mean that your watch has been magnetized. If this happens, contact in this manual are shown using dark figures on a light your original retailer or an authorized CASIO Service Center. background. • Button operations are indicated using the letters shown in the illustration. • Note that the product illustrations in this manual are intended for reference only, and so the actual product may appear somewhat different than depicted by an illustration. E-2 E-3 Things to check before using the watch Contents 1. Check the Home City and the daylight saving time (DST) setting. About This Manual …………………………………………………………………… E-3 Use the procedure under “To configure Home City settings” (page E-16) to configure your Things to check before using the watch ………………………………………… E-4 Home City and daylight saving time settings. -
Capricious Suntime
[Physics in daily life] I L.J.F. (Jo) Hermans - Leiden University, e Netherlands - [email protected] - DOI: 10.1051/epn/2011202 Capricious suntime t what time of the day does the sun reach its is that the solar time will gradually deviate from the time highest point, or culmination point, when on our watch. We expect this‘eccentricity effect’ to show a its position is exactly in the South? e ans - sine-like behaviour with a period of a year. A wer to this question is not so trivial. For ere is a second, even more important complication. It is one thing, it depends on our location within our time due to the fact that the rotational axis of the earth is not zone. For Berlin, which is near the Eastern end of the perpendicular to the ecliptic, but is tilted by about 23.5 Central European time zone, it may happen around degrees. is is, aer all, the cause of our seasons. To noon, whereas in Paris it may be close to 1 p.m. (we understand this ‘tilt effect’ we must realise that what mat - ignore the daylight saving ters for the deviation in time time which adds an extra is the variation of the sun’s hour in the summer). horizontal motion against But even for a fixed loca - the stellar background tion, the time at which the during the year. In mid- sun reaches its culmination summer and mid-winter, point varies throughout the when the sun reaches its year in a surprising way. -
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 -
Grand Complication No. 97912 Fetches $2,251,750
PRESS RELEASE | N E W Y O R K | 1 1 JUNE 2013 FOR IMMEDIATE RELEASE CHRISTIE’S NEW YORK IMPORTANT WATCHES AUCTION TOTALS $7,927,663 The Stephen S. Palmer PATEK PHILIPPE GRAND COMPLICATION NO. 97912 FETCHES $2,251,750 WORLD AUCTION RECORD FOR A PATEK PHILIPPE GRAND COMPLICATION * THE HIGHEST TOTAL ACHIEVED FOR ANY WATCH AT CHRISTIE’S NEW YORK THE HIGHEST PRICE ACHIEVED FOR ANY WATCH THUS FAR IN 2013 CHRISTIE’S CONTINUES TO LEAD THE MARKET FOR POCKETWATCHES AND WRISTWATCHES WITH US$50.3 MILLION IN AUCTION SALES ACHIEVED ACROSS 3 SALE SITES New York – On 11 June 2013, Christie’s New York auction of Important Watches achieved a total result of US$7,927,663 (£5,073,704 / €5,945,747), selling 87% by lot and 94% by value. The star lot of the day-long auction was the history changing Stephen S. Palmer Patek Philippe Grand Complication No. 97912 which achieved an impressive $2,251,750. Manufactured in 1898, this 18k pink gold openface minute repeating perpetual calendar split-seconds chronograph clockwatch with grande and petite sonnerie, and moon phases is a spectacular addition to scholarship surrounding Patek Philippe and Grand Complications in general. Aurel Bacs, International Head of Watches, commented: “Today’s auction marked an unparalleled event at Christie’s New York flagship saleroom in Rockefeller Center. The sale of Stephen S. Palmer Patek Philippe Grand Complication, No. 97912 cements Christie’s leadership in the category of the world’s most exceptional and rare timepieces. We were thrilled to see such active participation across 30 countries, 5 continents and over 250 Christie’s LIVE™ bidders demonstrating the ever increasing demand of our exceptionally curated sales.” WORLD AUCTION RECORD FOR ROLEX REFERENCE 5036 The Rolex, Reference 5036, a fine and rare 18K pink gold triple calendar chronograph wristwatch featuring a two-toned silvered dial with two apertures for day and month in French, circa 1949 sold for $171,750 / £109,920 / €128,813, establishing a new world auction record for the reference. -
Unprecedented Collecting Opportunites at SPRING 2012 IMPORTANT WATCHES AUCTION
For Immediate Release 3 May 2012 Contact: Luyang Jiang (Hong Kong) +852 2978 9919 [email protected] Belinda Chen (Beijing) +8610 6500 6517 [email protected] CHRISTIE‟S HONG KONG PRESENTS: Unprecedented Collecting Opportunites at SPRING 2012 IMPORTANT WATCHES AUCTION Offering More than 500 timepieces valued in excess of HK$120 million/US$16 million An important private collection of 20 examples of haute horology leads the season, including the Franck Muller Aeternitas Mega 4 - the most complicated wristwatch ever manufactured with a 36 complications The largest selection of vintage Patek Philippes ever offered in Asia An extraordinary collection of the famed Harry Winston Opus Series never before seen at auction Important Watches 9.30am & 2pm, Wednesday, 30 May, 2012 Woods Room, Convention Hall, Hong Kong Convention and Exhibition Centre No. 1 Harbour Road, Wan Chai, Hong Kong Click here to view a short video of auction highlights Hong Kong –Christie‟s will present more than 500 of the world‟s finest and rarest timepieces on 30 May with its Spring auction Important Watches. Valued in excess of HK$120 million/US$16 million, the sale offers an array of highly collectible horological creations that promises to excite and inspire the most discerning collectors, including masterworks from every top manufacturer. Leading the sale is one of the largest single owner collection of contemporary watches from world‟s top makers including brands never before offered at auction, the most prominent collections of Harry Winston Opus series watches ever offered at auction, an array of vintage and modern complicated wristwatches, stunning high jewellery wristwatches, as well rare and historical pocket watches. -
President's Forum Is Brought to You for Free and Open Access by the Journals at U.S
Naval War College Review Volume 56 Article 1 Number 1 Winter 2003 President’s Forum Rodney P. Rempt Follow this and additional works at: https://digital-commons.usnwc.edu/nwc-review Recommended Citation Rempt, Rodney P. (2003) "President’s Forum," Naval War College Review: Vol. 56 : No. 1 , Article 1. Available at: https://digital-commons.usnwc.edu/nwc-review/vol56/iss1/1 This President's Forum is brought to you for free and open access by the Journals at U.S. Naval War College Digital Commons. It has been accepted for inclusion in Naval War College Review by an authorized editor of U.S. Naval War College Digital Commons. For more information, please contact [email protected]. Rempt: President’s Forum Rear Admiral Rempt is a 1966 graduate of the U.S. Naval Academy. Initial assignments included deploy- ments to Vietnam aboard USS Coontz (DLG 9) and USS Somers (DDG 34). He later commanded USS Antelope (PG 86), USS Callaghan (DDG 994), and USS Bunker Hill (CG 52). Among his shore assign- ments were the Naval Sea Systems Command as the ini- tial project officer for the Mark 41 Vertical Launch System; Chief of Naval Operations (CNO) staff as the Aegis Weapon System program coordinator; director of the Prospective Commanding Officer/Executive Officer Department, Surface Warfare Officers Schools Com- mand; and Director, Anti-Air Warfare Requirements Division (OP-75) on the CNO’s staff. Rear Admiral Rempt also served in the Ballistic Missile Defense Orga- nization, where he initiated development of Naval Theater Ballistic Missile Defense, continuing those ef- forts as Director, Theater Air Defense on the CNO’s staff. -
GLONASS Time. 2. Generation of System Timescale
GLONASS TIME SCALE DESCRIPTION Definition of System 1. System timescale: GLONASS Time. 2. Generation of system timescale: on the basis of time scales of GLONASS Central Synchronizers (CS). 3. Is the timescale steered to a reference UTC timescale: Yes. a. To which reference timescale: UTC(SU), generated by State Time and Frequency Reference (STFR). b. Whole second offset from reference timescale: 10800 s (03 hrs 00 min 00 s). tGLONASS =UTC (SU ) + 03 hrs 00 min c. Maximum offset (modulo 1s) from reference timescale: 660 ns (probability 0.95) – in 2014; 4 ns (probability 0.95) – in 2020. 4. Corrections to convert from satellite to system timescale: SVs broadcast corrections τn(tb) and γn(tb) in L1, L2 frequency bands for 30-minute segments of prediction interval. a. Type of corrections given; include statement on relativistic corrections: Linear coefficients broadcast in operative part of navigation message for each SV (in accordance with GLONASS ICD). Periodic part of relativistic corrections taking into account the deviation of individual SVs orbits from GLONASS nominal orbits is incorporated in calculation of broadcast corrections to convert from satellite timescale to GLONASS Time. b. Specified accuracy of corrections to system timescale: The accuracy of calculated offset between SV timescale and GLONASS Time – 5,6 ns (rms). c. Location of corrections in broadcast messages: L1/L2 - τn(t b) – line 4, bits 59 – 80 of navigation frame; - γn(t b) - line 3, bits 69 – 79 of navigation frame. d. Equation to correct satellite timescale to system timescale: L1/L2 tGLONASS = t +τ n (tb ) − γ n (tb )( t − tb ) where t - satellite time; τn(t b), γn(tb) - coefficients of frequency/time correction; tb - time of locking frequency/time parameters. -
Chapter 8: Geologic Time
Chapter 8: Geologic Time 1. The Art of Time 2. The History of Relative Time 3. Geologic Time 4. Numerical Time 5. Rates of Change Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Geologic Time How long has this landscape looked like this? How can you tell? Will your grandchildren see this if they hike here in 80 years? The Good Earth/Chapter 8: Geologic Time The Art of Time How would you create a piece of art to illustrate the passage of time? How do you think the Earth itself illustrates the passage of time? What time scale is illustrated in the example above? How well does this relate to geological time/geological forces? The Good Earth/Chapter 8: Geologic Time Go back to the Table of Contents Go to the next section: The History of (Relative) Time The Good Earth/Chapter 8: Geologic Time The History of (Relative) Time Paradigm shift: 17th century – science was a baby and geology as a discipline did not exist. Today, hypothesis testing method supports a geologic (scientific) age for the earth as opposed to a biblical age. Structures such as the oldest Egyptian pyramids (2650-2150 B.C.) and the Great Wall of China (688 B.C.) fall within a historical timeline that humans can relate to, while geological events may seem to have happened before time existed! The Good Earth/Chapter 8: Geologic Time The History of (Relative) Time • Relative Time = which A came first, second… − Grand Canyon – B excellent model − Which do you think happened first – the The Grand Canyon – rock layers record thousands of millions of years of geologic history.