In [removed] Why new Date('2012-1-15') - new Date('2012-01-15') == 21600000

Question

I\'m confused but in javascript:

> new Date(\'2012-1-15\') - new Date(\'2012-01-15\')
  21600000

Why is that? (21600000 / 1000 / 3600 ==

Answer 1

a= new Date('2012-1-16') 
b= new Date('2012-01-16')
alert(a);
alert(b);

For the first case, the constructor function sets time to 00:00 in your time zone. But in the second case, it initialize time relative to GMT +00.00