Bah, Hum Computer Bug

My Christmas countdown JavaScript was reporting the wrong amount of days. Before Noon it was correct, but after that it was a day off. This time I have thoroughly debugged it and made it shorter than the original script.

<!-- Christmas Countdown - Jeff Miller--><br /> <script language="JavaScript"> function eventcount() { var now = new Date(); var message = ""; var event = new Date("Dec 25 2006 00:00:01"); var seconds = (event - now) / 1000; var minutes = seconds / 60; var hours = minutes / 60; var days = hours / 24; if ( (days%1)<.5) days++; days = Math.round(days); if (hours< 0 && hours >= -24) message = "Merry Christmas; Christ is born!"; else if (days > 0) message = "Only "+days+" praying day"+ (days>1?'s':'')+ " till Christmas!"; document.write("</p> <p>"+message+"</p> <p>"); } eventcount(); </script><br /> <!-- End Christmas Countdown --><br />