First Radian Day

Is it February 27? If so, then happy First Radian Day!

First Radian Day celebrates the 58th day of the year. 58 ≅ 365.256/2π. That is, it is the day during which the path traced by the Earth around the Sun, starting from the beginning of the year, is momentarily the same length as the distance between the Earth and Sun, to a first approximation. This is of course way more mathematically and geometrically interesting than Decimal Approximation Pi Day on 3/14.