How Many Days Until Christmas : Date « Development « JavaScript DHTML

How Many Days Until Christmas

JavaScript Bible, Fourth Edition
by Danny Goodman 

John Wiley & Sons CopyRight 2001

<TITLE>Christmas Countdown</TITLE>
function getDaysUntilXmas() {
    var oneMinute = 60 * 1000
    var oneHour = oneMinute * 60
    var oneDay = oneHour * 24
    var today = new Date()
    var nextXmas = new Date()
    if (today.getMonth() == 11 && today.getDate() > 25) {
        nextXmas.setFullYear(nextXmas.getFullYear() + 1)
    var diff = nextXmas.getTime() - today.getTime()
    diff = Math.floor(diff/oneDay)
    return diff
var header = "You have <I>" + getDaysUntilXmas()  + "</I> "
header += "shopping days until Christmas."


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