Specifying a time for timer to end.
Specifying an exact time for the countdown timer to end is a case of adding the required time to the end of the launchDay variable in the init.js file.
Currently the launchDay variable looks like this:
var launchDay = new Date(2015, 4-1, 20);
If 5pm is you required time, then the code will now look like this:
var launchDay = new Date(2015, 4-1, 20, 17, 0, 0);