In order to run a robot at a specified time, place the following code at the top of the robot you want to schedule:

use System, Date;

var startTime = "2017-02-17 21:00";
startTime = Date.parse(startTime, "yyyy-MM-dd HH:mm");
var hasToWait = true;
while(hasToWait){
  System.wait(10000);
  if(Date.isAfter(Date.now(), startTime)){
      hasToWait = false;
  }
}

/* start robot code from here */

Modify the startTime accordingly and press Play to start the robot.