javascript date is wrong format

Question

I have a function that gets a date from a jQuery calendar and then formats it in year-month-day.

The date I get for the calendar is 03/04/2013 for dateString and then I want it in the format of 2013-03-04. But the date I am getting for start_date is 2013-21-04. Strange because it had been ok, I think.

function makeUpDates() {
    // concantenate values to date_start and date_end hidden inputs
    var dateString = document.getElementById('date').value, date = new Date(dateString);
    document.getElementById('date_start').value = date.getFullYear() + '-' + (date.getMonth() + 1) + '-' + ("0" + date.getDate()).slice(-2);
    var numDays = document.getElementById('slider').value;
    date.setDate(date.getDate() + parseInt(numDays));
    var dateEnd = date.getFullYear() + '-' + (date.getMonth() + 1) + '-' + ("0" + date.getDate()).slice(-2);
    document.getElementById('date_end').value = dateEnd;
}

[Always specify the radix when you use parseInt()](http://stackoverflow.com/questions/6611824/why-do-we-need-to-use-radix) (e.g. `parseInt(numDays,10)`) — Aaron Blenkush, Mar 04 '13 at 18:36

score 1 · Accepted Answer · edited May 23 '17 at 11:49

You can convert the dates like this

//will take a date in the form MM/DD/YYYY and return YYYY-MM-DD
function convertDate(dateString){
    var dateparts = dateString.split("/");
    var newDate = dateparts[2]+"-"+dateparts[0]+"-"+dateparts[1]
    return newDate;
}

Also for more general Date handling you can check out moment.js, mentioned in this answer to a more general question on this topic

score 1 · Answer 2 · answered Mar 04 '13 at 18:35

1

start_date is 2013-21-04

Probably you forgot the parenthesis around date.getMonth()+1 in the string concatenation, yielding 21 instead of 3. It seems to be fixed in the snippet you posted though.

answered Mar 04 '13 at 18:35

Bergi

630,263
148
957
1,375

javascript date is wrong format

2 Answers2