Decimiaisation of currency happened in Ireland on the 15th of
February, 1971.
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People have tried to decimalise the measurement of time - most
famously, the French Revolutionary time - but the 60:60:24 system
is too well established.
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Minutes and seconds. It is becoming more commonplace to
decimalise anything after the degree notation. Such as 6.50 degrees
N instead of 6 deg 30 mins 0 secs N
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Decimalisation (or decimalization) of currency was introduced in the United States in 1792.
Russia the first country to decimalise did it in 1710