--s date: Import only records on or after 'date'. If not specified, the
-script will import the entire history (if -r is specified) or everything
-since the last import (if not). Note that the API request doesn't have any
-limits, so the entire data file will be downloaded regardless, but parsing
-and importing the records is considerably slower than downloading them.
-
--e date: Import only records before 'date'. See above.