Question

I am trying to understand more about the Date object in javascript.
I thought that when you call valueOf(), you get the amount of milliseconds since january 1, 1970.
So what I would expect is that the following should return exactly zero;

alert((new Date(1970, 1, 1).valueOf() )/ ( 86400 * 1000));

but it does not, it returns 30.958333333333332. What am I missing?

gr,

Coen

Answer 1

Second parameter, month, starts with 0, so you need to do:

alert((new Date(1970, 0, 1).valueOf() )/ ( 86400 * 1000));

but even with this you’ll get the offset, in seconds, off GMT.

the value you posted says you are GMT +1 : )