function yearProgression(timestamp) {
var now = timestamp;
var start = new Date(now.getFullYear(), 0, 0);
var diff = now - start;
var oneDay = 1000 * 60 * 60 * 24;
var day = Math.floor(diff / oneDay);
if (day > 178) {
return 178 - (day - 178);
}
return day;
}