Check if date object is over one year old

Question

I would like to see if a date object is over one year old! I don't know how to even compare them due to the leap years etc..

var oldDate = new Date("July 21, 2001 01:15:23");
var todayDate = new Date();

if(???) {
    console.log("it has been over one year!");
} else {
    console.log("it has not gone one year yet!");
}

Possible duplicate of [Difference between dates in JavaScript](http://stackoverflow.com/questions/1968167/difference-between-dates-in-javascript) — Paul Roub, Oct 02 '15 at 20:00
Note [this answer](http://stackoverflow.com/a/2400624/1324) which specifically shows how to alert when the difference is > 365 days. — Paul Roub, Oct 02 '15 at 20:00

score 5 · Answer 1 · answered Oct 02 '15 at 20:02

5

You could make the check like this

(todayDate - oldDate) / (1000 * 3600 * 24 * 365) > 1

You can see and try it here:

https://jsfiddle.net/rnyxzLc2/

answered Oct 02 '15 at 20:02

Esteban Filardi

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Rick Hitchcock · Answer 2 · 2019-04-09T14:44:17.137

1

This code should handle leap years correctly.

Essentially:

If the difference between the dates' getFullYear() is more than one,
or the difference equals one and todayDate is greater than oldDate after setting their years to be the same,
then there's more than a one-year difference.

var oldDate = new Date("Oct 2, 2014 01:15:23"),
    todayDate = new Date(),
    y1= oldDate.getFullYear(),
    y2= todayDate.getFullYear(),
    d1= new Date(oldDate).setFullYear(2000),
    d2= new Date(todayDate).setFullYear(2000);

console.log(y2 - y1 > 1 || (y2 - y1 == 1 && d2 > d1));

edited Apr 09 '19 at 14:44

answered Oct 02 '15 at 20:18

Rick Hitchcock

35,202
5
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setYear is deprecated, but it looks like setFullYear will work for this case – vpzomtrrfrt Apr 08 '19 at 21:53

score -1 · Answer 3 · answered Oct 02 '15 at 19:52

-1

use getFullYear():

fiddle: https://jsfiddle.net/husgce6w/

var oldDate = new Date("July 21, 2001 01:15:23");
var todayDate = new Date();
var thisYear = todayDate.getFullYear();
var thatYear = oldDate.getFullYear();
console.log(todayDate);
console.log(thatYear);

if(thisYear - thatYear > 1) {
    console.log("it has been over one year!");
} else {
    console.log("it has not gone one year yet!");
}

answered Oct 02 '15 at 19:52

Jesse

1,262
1
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19

2

This would return true for dates that are only one day apart, in the case of 12/31/2015 vs 1/1/2016 – Will P. Oct 02 '15 at 19:53

Check if date object is over one year old

3 Answers3