Question

To compage 2 date i’m doing a conversion from a string to the javascript Date object.

This is an exemple of the code i have:

 var date1 = new Date(dateArrray1[2], dateArrray1[1], dateArrray1[0], 0, 0, 0, 0);
 var date2 = new Date(dateArrray2[2], dateArrray2[1], dateArrray2[0], 0, 0, 0, 0);

My issu is on the fact that when i’m doing a validation on those 2 date object I got the same result on the getTime function for a certain date.

var date1 = new Date(2012, 01, 30, 12, 0, 0, 0).getTime()
var date2 = new Date(2012, 02, 01, 12, 0, 0, 0).getTime()

Normally the value of date1 dans date2 should be different. But surprise! The value of those 2 object are the same (actually the value is 1330621200000).

Do someone got the same issue as me?

Answer 1

Javascript dates use 0-based months.
If you pass an invalid date, such as February 30^th, it will figure out what that date actually is.
Thus, February 30^th of a leap year is the same as March 1^st.