- Currently, seat link data sends the previous day's historical data.
  This appears to have been done because historical data used to contain
  date, not timestamp. So, to avoid problems like seemingly future
  dates being received from GitLab instances in timezones ahead of UTC,
  the seat link data sends the previous day's historical data. Now that
  the historical data contains a timestamp with timezone, we can send
  the latest historical data instead.

- Format the timestamp using the iso8601 format when transmitting.