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ISO 8601 date format diagram showing Thanksgiving dates in the U.S. and Canada, highlighting how movable holidays are represented with clear, standardized date formats.
ANSI

Thanksgiving & ISO 8601: How Date Standards Clarify Holidays

ByAlexandra Schirn November 17, 2025November 12, 2025

The international recognition of the ISO 8601 time and date format helps us understand the importance of consistency in time-keeping. For instance, when booking travel,…

Globe of the world with a map in the background
ANSI

How the ISO Date Format Tells Today

ByBrad Kelechava January 7, 2019June 5, 2025

Which date format is the standard? ISO takes a different approach. With time on our water-and-dirt-based planet, some things are absolute. For instance, it takes…

Closeup of calendar dates
ANSI | History | Measurements and Math History

History of the Standard Gregorian Calendar

ByBrad Kelechava February 10, 2016May 22, 2025

The Gregorian calendar has become the standard for measuring the progression of time since Pope Gregory XIII first introduced it in the year 1582. His papal influence…

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