May 20, 2019
The International System of Units (SI): The base units are redefined, making the international prototype of the kilogram obsolete.
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Source: Wikipedia (CC BY-SA)
On May 20, in the year 2019:
The International System of Units (SI): The base units are redefined, making the international prototype of the kilogram obsolete.
The International System of Units, internationally known by the abbreviation SI, is the modern form of the metric system and the world's most widely used system of measurement.
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Source: Internal
Why May 20, 2019 matters:
The International System of Units (SI): The base units are redefined, making the international prototype of the kilogram obsolete.
What began on this day left a lasting mark on history. The effects were felt immediately and continued to shape events, ideas, and lives long afterwards.
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Source: Internal
Historical context: May 20, 2019
The 21st century has already seen profound shifts: the digital revolution has connected billions while reshaping politics and culture; climate change has emerged as a defining crisis; and new powers have risen to challenge the world order that followed the Cold War.
The event on this day: The International System of Units (SI): The base units are redefined, making the international prototype of the kilogram obsolete.
Source: https://en.wikipedia.org/wiki/International_System_of_Units (Wikipedia, CC BY-SA)
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