require('scheduler');
sys = require('sys');
scheduler = new Scheduler();
scheduler.addJob(new Date("October 27, 2011 11:13:00"), function(){
    sys.puts('You will see this message at the specified datetime');
});

From npm: `sudo npm install at_scheduler`

This is under a dual license, MIT and GPLv3.

Node.js is an official trademark of Joyent. This module is not formally related to or endorsed by the official Joyent Node.js open source or commercial project