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

The result of new Date('2012-1-15') is implementation-dependent (ECMAScript standard, clause 15.9.4.2).