substring indexof split

var extractDate = function(currentTime){
    console.log("currentTime is : " + currentTime);
    //2015-08-05T10:44:00+02:00
    var actualStr = currentTime.substring(0, currentTime.indexOf("+")); //2015-08-05T10:44:00
    var ymdStr = actualStr.substring(0, actualStr.indexOf("T")); //2015-08-05
    var hmStr = actualStr.substring(actualStr.indexOf("T")+1, actualStr.length); //10:44:00
    var ymdArray = ymdStr.split("-");
    var hmArray = hmStr.split(":");

    var mouth = parseInt(ymdArray[1], 10);
    var day = parseInt(ymdArray[2], 10);
    var hour = parseInt(hmArray[0], 10);
    var minute = parseInt(hmArray[1], 10);
    console.log("mouth: " + mouth);
    console.log("day: " + day);
    console.log("hour: " + hour);
    console.log("minute: " + minute);
};

extractDate("2015-08-05T10:44:00+02:00");

new Date() 用来获取当前系统时间，包括时区，比如在时区设置为俄罗斯，时间为：

 Mon Aug 06 2018 06:09:39 GMT+0300 (GMT-3)另外new Date()还提供了一系列方法来获取年月日星期时分秒等信息：

getFullYear() getMonth() getDate() getDay() getHours() getMinutes() getSeconds()