CODEWITHSUNDEEP
javascript
Pryach
Pryach

Reputation: 417

Javascript - Date difference is incorrect

I need to get the difference in seconds between two dates and times.

I have this script:

var date1 = new Date(2013,10,02,12,00,00);
var date2 = new Date(2013,10,02,12,01,00);

var diff = date2 - date1;
diff = diff / 1000;
document.write(diff);

Which returns the value of 60, 60 seconds difference, good.

However, when I cross over a month with 30 days, it doesn't calculate correctly.

var date1 = new Date(2013,9,30,12,00,00);
var date2 = new Date(2013,10,02,12,00,00);

var diff = date2 - date1;
diff = diff / 1000;
document.write(diff);

The result returned is 259200, which is 3 days. The difference between September 30 and October 2 is only 2 days, 172800, because there are only 30 days in the month. Why does Javascript seem to think there are 31 days in September?

Upvotes: 1

Views: 194

Answers (1)

Pointy
Pointy

Reputation: 413682

The month numbers start with 0, not 1. So 9 is October and 10 is November.

Upvotes: 6

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