          '%H:%M',        # '04:31'
          '%H:%M:%S',     # '04:31:59'
          '%H:%M:%S.%f',  # '04:31:59.000200'
      ),
      'TIME_OUTPUT_FORMAT': None,
  }
  
  
  # List of settings that may be in string import notation.
  IMPORT_STRINGS = (
 
</s> remove         '%H:%M',        # '04:31'
        '%H:%M:%S',     # '04:31:59'
        '%H:%M:%S.%f',  # '04:31:59.000200'
 </s> add         ISO8601, </s> remove     'DATETIME_OUTPUT_FORMAT': None,
 </s> add     'DATETIME_OUTPUT_FORMAT': ISO8601, </s> remove         '%Y-%m-%d',              # '1984-07-31'
        '%Y-%m-%d %H:%M',        # '1984-07-31 04:31'
        '%Y-%m-%d %H:%M:%S',     # '1984-07-31 04:31:59'
        '%Y-%m-%d %H:%M:%S.%f',  # '1984-07-31 04:31:59.000200'
 </s> add         ISO8601, </s> remove         '%Y-%m-%d',     # '1984-07-31'
 </s> add         ISO8601, </s> remove     'DATE_OUTPUT_FORMAT': None,
 </s> add     'DATE_OUTPUT_FORMAT': ISO8601,
    'TIME_OUTPUT_FORMAT': ISO8601,
          '%H:%M',        # '04:31'
          '%H:%M:%S',     # '04:31:59'
          '%H:%M:%S.%f',  # '04:31:59.000200'
      ),
    'TIME_OUTPUT_FORMAT': ISO8601,
  }
  
  
  # List of settings that may be in string import notation.
  IMPORT_STRINGS = (
keep keep keep keep replace keep keep keep keep keep
 Add new ISO8601 setting + integration 
rest_framework/settings.py