title: Make my arduino accomplish task at specific time
body: <p>I'm a newbie to arduino. What I need is make him do something at specific time, and go to sleep, so that it doesn't work excessively. </p>
  
  <p>Specific task is: I want him to start a mechanism for feeding my gold fish, so in vacation time arduino should work for 10 days or more (this is reason for sleep mode).</p>
  
  <p>When researching this problem, I came up with time interrupts, but I don't think this is best solution, because I want him do something at specific time, not to to interrupt his task.</p>
  
  <p>Thank you for any kind of help :)</p>