MongoDBのISODateの関数仕様を見る

Mongo Shell 内で ISODate.toString() すれば実装が見れます。
以下は、MongoDB-2.6.4 での出力例です。

ISODate

function (isoDateStr){
    if (!isoDateStr)
        return new Date();

    var isoDateRegex = /(\d{4})-?(\d{2})-?(\d{2})([T ](\d{2})(:?(\d{2})(:?(\d{2}(\.\d+)?))?)?(Z|([+-])(\d{2}):?(\d{2})?)?)?/;
    var res = isoDateRegex.exec(isoDateStr);

    if (!res)
        throw "invalid ISO date";

    var year = parseInt(res[1],10) || 1970; // this should always be present
    var month = (parseInt(res[2],10) || 1) - 1;
    var date = parseInt(res[3],10) || 0;
    var hour = parseInt(res[5],10) || 0;
    var min = parseInt(res[7],10) || 0;
    var sec = parseInt((res[9] && res[9].substr(0,2)),10) || 0;
    var ms = Math.round((parseFloat(res[10]) || 0) * 1000);
    if (ms == 1000) {
        ms = 0;
        ++sec;
    }
    if (sec == 60) {
        sec = 0;
        ++min;
    }
    if (min == 60) {
        min = 0;
        ++hour;
    }
    if (hour == 24) {
        hour = 0;   // the day wrapped, let JavaScript figure out the rest
        var tempTime = Date.UTC(year, month, date, hour, min, sec, ms);
        tempTime += 24 * 60 * 60 * 1000;    // milliseconds in a day
        var tempDate = new Date(tempTime);
        year = tempDate.getUTCFullYear();
        month = tempDate.getUTCMonth();
        date = tempDate.getUTCDate();
    }

    var time = Date.UTC(year, month, date, hour, min, sec, ms);

    if (res[11] && res[11] != 'Z'){
        var ofs = 0;
        ofs += (parseInt(res[13],10) || 0) * 60*60*1000; // hours
        ofs += (parseInt(res[14],10) || 0) *    60*1000; // mins
        if (res[12] == '+') // if ahead subtract
            ofs *= -1;

        time += ofs
    }

    return new Date(time);
}

Date に比べて初期化時に渡せる引数のパターンが少なかった。
タイムスタンプはダメなんすね..