The artist behind Milk The Bunny pasted this for Pi Day's celebration of the mathematical constant π (pi), which of course, has been highjacked by foodies wanting to celebrate pie. For math fans (mathies?) this years Pi Day is significant because it's 2015. Mathies will have to wait a century for the sequence of numbers in the calendar to matches pi -- 3/14/15. "While the mathematical constant, which represents the ratio of circumference of a circle divided by its diameter, is often abbreviated as 3.14 for convenience, pi actually has an infinite number of digits beyond the decimal point, starting with 3.141592653." ABC News
ABOVE: James Turrell at Crystals monorail station.