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In November 2019, the United Nations Education, Scientific and Cultural Organisation (UNESCO) named March 14, of every year as the International Day of Mathematics.
This was in recognition of the central role Mathematics has in our lives. Prior to that, the day had been celebrated as World Pi Day, after the famous mathematical constant, the first three digits of which are 3.14.
In the American rendering, 3.14 is March 14, hence the choice of that date.
The date also has great significance for two of the most celebrated figures in science. On March 14, 1879, Albert Einstein was born.
Just 26 years later, the publication of his Annus Mirabilis papers changed physics and altered how we conceive light, matter, time and space.