https://en.wikipedia.org/wiki/Programmers%27_Day
o = (function() { p = 'programmer'; d = 'day'; h = 'Happy'; r = Math.floor((Math.random()*10000)); (r % 2 === 0)?ap="'s":ap="s'"; return h + ' ' + p + ap + ' ' + d; }); o();
See rule #4
https://en.wikipedia.org/wiki/Programmers%27_Day