Looking into Dart's DateTime class for something and saw it has a hardcoded maximum elapsed milliseconds from epoch of 8.64x10^15 (plus or minus). I figured it'd be a 2^64 or 2^63 type number. Ah well watch out in ~274,000 years when this Y2K type bug may crop up... :) (with 63/64 bit numbers it'd go out 1000X longer). #dartlang #DevHumor