Not arbitrary.
Since 2019, the meter has been defined as the length of the path traveled by light in vacuum during a time interval of 1/299792458 of a second, where the second is defined by a hyper-fine transition frequency of caesium.
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Cake day: June 12th, 2023
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What Israel do exactly what every insider knows they will do, when they will do it, and they all profit off it.
FTFY