Date class setters

Hello again,

I experienced that the Date class has no setters like:

Date.setHours(Number);
Date.setMinutes(Number);
Date.setSeconds(Number);
...

How can I create a new Date() object for example for today, but time of day 12:00 for example?

In regular JavaScript I write something like this:

var d = new Date();
d.setHours(12);
d.setMinutes(0);
d.setSeconds(0);

In Espruino this doesn't work :(

Best,

Tobias