var now = new Date();
var thisYr = now.getYear();
if (thisYr < 1900) { thisYr = (thisYr + 1900); }
var nextYr = thisYr+1;
var firstconcert = new Date(2003,6,15);
var concertcount = 60;
var lastconcert = new Date(2011,3,27);
var concert = new Date(thisYr,9,11);
var concertcoming = 0;
var numBands = 133;

if (concert.getTime() < now.getTime()) { concert.setYear(nextYr); }

function dayToDays(inTime) { return (inTime.getTime() / (1000*60*60*24)); }

function daysTill(inDate) { return (Math.ceil(dayToDays(inDate) - dayToDays(now))); }

function daysSince(inDate) { return (Math.ceil(dayToDays(now) - dayToDays(inDate))); }

function daysAvg(inDate) { return (Math.ceil(daysSince(firstconcert)/concertcount)); }