title: What's the difference between event_timestamp and message_time in Firebase?
body: <p>In Google's Firebase documentation, I found a definition for <strong>message_time</strong> being the message sent timestamp, but I couldn't find one for <strong>event_timestamp</strong>. <a href="https://support.google.com/firebase/answer/7061705?hl=en" rel="nofollow noreferrer">https://support.google.com/firebase/answer/7061705?hl=en</a></p>
  
  <p><a href="https://i.stack.imgur.com/TpyUm.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/TpyUm.png" alt="Google BigQuery data from Firebase"></a></p>
  
  <p>When I converted these times from Epoch to human-readable format, there was a difference of a few seconds (10:14:22 PM vs. 10:14:28 PM). Can someone tell me what the functional difference is between these two fields?</p>