International Mathematics Day
International Mathematics Day is held on March 14. This event in the second decade of the month March is annual. 
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If anyone multiplies 111,111,111* 111, 111, 111, you get a palindromic number. The shape of the sunflower follows the Fibonacci sequence. The fraction of Pi is 22 over 7, but its actual number is still unknown to everyone. The mystery of Pi is simply spooky.
The UNESCO General Conference declared March 14 International Mathematics Day. The chosen date coincides with π Day, which in turn comes from the first three digits of the number in question (3,14...), which match the way a date is read in the Anglo-Saxon system. In November 2019, the General Conference of UNESCO in Resolution 40/302 declared March 14 International Mathematics Day.
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