Tag Archives: April

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Time & Frequency Services

The National Institute of Standards and Technology is responsible for maintaining and disseminating official time in the United States. While NIST does not have a direct role in implementing clock changes for daylight saving time, it does play an important role in ensuring that timekeeping systems across the country are accurate and consistent.

Prior to the implementation of daylight saving time, NIST issues public announcements reminding individuals and organizations to adjust their clocks accordingly. NIST also provides resources to help people synchronize their clocks, such as the time.gov website and the NIST radio station WWV.

In addition, NIST is responsible for developing and maintaining the atomic clocks that are used to define Coordinated Universal Time (UTC), the international standard for timekeeping. UTC is used as the basis for all civil time in the United States, and it is the reference time used by many systems, including the Global Positioning System (GPS) and the internet.

Overall, while NIST does not have a direct role in implementing clock changes for daylight saving time, it plays an important role in ensuring that timekeeping systems across the country are accurate and consistent, which is essential for the smooth implementation of any changes to the system.

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Time Realization and Distribution

Horologiorum

Horologiorum

University of Michigan

Western University Ontario

Trinity College

Mississippi State University

南洋華僑中學

Shelton State Community College Alabama

Winona State University

Oklahoma City Community College

University of Illinois

Bucknell University Pennsylvania

St. Francis Xavier College Missouri

University of Mississippi

University of North Dakota

University of Montana

Gardner-Webb University North Carolina

University of California Berkeley

Auburn University Alabama

 

Indiana University

Sam Houston State University Texas

Otago University New Zealand

Hillsdale College Michigan


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ISO 8601:2004 Data elements and interchange formats — Information interchange — Representation of dates and times

National Institute of Science & Technology: Time and Frequency

National Institute of Science & Technology: Current Reliability of the WWVB Time Code

NFPA 72 National Fire Alarm & Signaling Code Chapter 23: Protected Premises Alarm and Signaling Systems

Date & Time: Representations For Information Interchange

“A Philosopher Lecturing on the Orrery” | Joseph Wright (1766)

Most nations follow the day/month/year format (07/01/19 for January 7, 2019, for example), but the United States adheres to its own format of month/day/year (1/7/19 or 1/7/2019).   The potential for misinterpreting dates across national boundaries is the logic for ISO 8601:2019 – Data Elements And Interchange Formats – Information Interchange – Representation Of Dates And Times, the ISO format for dates represents year, month, and day from the largest unit to the smallest, most specific unit of time.  The ISO date format is the date format used in SQL and is the default date setting on many computers.

ISO 8601-1:2019 Date And Time – Representations For Information Interchange – Part 1: Basic Rules

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Time and Date

How the ISO Date Format Tells Today

ISO Date Format

Date and time formats used in HTML

Making Greenwich the centre of the world

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The Philosophy of Laughter and Smiling

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