How do I validate yyyy-mm-dd hh:mm:ss format

I saw this fiddle for validating mm/dd/yyyy or mm-dd-yyyy but I would like to validate yyyy-mm-dd hh:mm:ss format also how do I ensure that today is lesser than from date with the yyyy-mm-dd hh:mm:ss format?.

this is how I have initiated my date time picker..

$("#startDate, #endDate").datetimepicker({ dateFormat: 'yyyy-mm-dd hh:mm:ss'}); 

Please do help me to get this done.

Thanks

The date format that you have specified is ISO 8601. Most modern browsers support Date parsing of this string format. So you can do something like this.

Javascript

var iso8601 = "2013-02-01 10:00:00",
    userDate = new Date(iso8601),
    today = new Date(),
    dateTime,
    date,
    time,
    value;

// check is valid date
if (isNaN(userDate)) {
    alert("invalid userDate");
}

// check if userDate is before today
if (userDate.getDate() < today.getDate()) {
    alert("userDate is in past");
}

// check the string specifically matches "yyyy-mm-dd hh:mm:ss" and is valid
function isGregorianLeapYear(year) {
    return year % 400 === 0 || year % 100 !== 0 && year % 4 === 0;
}

function daysInGregorianMonth(year, month) {
    var days;

    if (month == 2) {
        days = 28;
        if (isGregorianLeapYear(year)) {
            days += 1;
        }
    } else {
        days = 31 - ((month - 1) % 7 % 2);
    }

    return days;
}

if (typeof iso8601 !== "string") {
    alert("not an iso8601 string");
} else {
    dateTime = iso8601.split(" ");
    if (dateTime.length !== 2) {
        alert("missing date or time element");
    } else {
        date = dateTime[0].split("-");
        if (date.length !== 3) {
            alert("incorrect number of date elements");
        } else {
            value = +date[0];

            if (date[0].length !== 4 || value < 1969 || value > 9999) {
                alert("year value is incorrect");
            }

            value = +date[1];
            if (date[1].length !== 2 || value < 1 || value > 12) {
                alert("month value is incorrect");
            }

            value = +date[2];
            if (date[2].length !== 2 || value < 1 || value > daysInGregorianMonth(+date[0], +date[1])) {
                alert("day value is incorrect");
            }
        }

        time = dateTime[1].split(":");
        if (time.length !== 3) {
            alert("incorrect number of time elements");
        } else {
            value = +time[0];
            if (time[0].length !== 2 || value < 0 || value > 23) {
                alert("hour value is incorrect");
            }

            value = +time[1];
            if (time[1].length !== 2 || value < 0 || value > 59) {
                alert("minute value is incorrect");
            }

            value = +time[2];
            if (time[2].length !== 2 || value < 0 || value > 59) {
                alert("second value is incorrect");
            }
        }
    }
}
console.log(userDate);
console.log(today);

jsFiddle