title: APK signed with a certificate that is not yet valid
body: <p>I'm trying to publish an app to google play, and it won't allow me, it says:</p>
  
  <pre><code>You uploaded an APK signed with a certificate that is not valid. 
  You need to sign tour APK with certificate that is currently valid.
  </code></pre>
  
  <p>Screenshot:</p>
  
  <p><img src="https://i.stack.imgur.com/xc9ru.jpg" alt="enter image description here"></p>
  
  <p>How do I remedy this error?</p>