Once a century the date and time aligns to a round figure and is a natural cause to celebrate.
There is a natural lure, especially of those more mathematically inclined, to notice patterns and sequences of numeric representations of dates. We notice sequences such as 11/12/13. We throw caution to the wind and don't beware the ides of March and instead commemorate Pi Day each year on March 14th. But there is another Pi Day that we should preparing for:
That is the magic time of alignment. If you represent date and time in YY/M/DD H:MM:SS format then the above date and time is none other than 31/4/15 9:26:53. Or more simply 3141592653. Throw in the needed decimal point and you get a fairly accurate representation of Pi (π): 3.141592653.
Start planning now: it is less than two decades away.