var days = 0;
var difference = 0;
var today = new Date();
var hour = today.getHours();

Start = new Date("May 6, 2005");
today = new Date();
difference = today - Start;
days = Math.floor(difference/(1000*60*60*24));
if (hour >= 12){ days = days + 1}
document.write("Our prayerful vigil has been in progress for " + days + " days.")