title: Fetch data at a given specific time?
body: <p>I am creaiting a leaderboard for my game using unity + firebase realtime database. How can I determine the winner of the week at a given speific time to announce it to players?
  For example, every Sunday 00:00, how can I fetch the leader?</p>
  
  <p>Thanks in advance,
  Cheers,</p>