Move over Pi Day! We now have Square Root of 2 Day! It is in January because of the whole number one. And when you take 41% times the month of February, while taking leap year into account, it falls on the 12th day of the second month.
So here is a simplified version of the Square Root Flag to the 100ths place. This flag is based upon the international maritime signals where a red disc represents 1 and a white cross on red represents a four. It neatly echos the value of 1.41 when you stare at this flag.