What is the difference between the "time" and "date_created" parameter shown in tracking events?

• "Time" refers to the moment the USPS scans a mail piece. If your account has access to the "Mailed" event, this timestamp can be utilized to monitor Lob’s SLA adherence.
  
  
• "Date_created" is the time that Lob receives the tracking data from the USPS and makes it available in the API.

Due to the reliance on the USPS to provide the data, please note that there may be a lag between the two timestamps.