The SAS log does have the date and time at the top.
1                                                          The SAS System                                 09:42 Monday, May 14, 2018
NOTE: Copyright (c) 2016 by SAS Institute Inc., Cary, NC, USA. 
NOTE: SAS (r) Proprietary Software 9.4 (TS1M5) 
      Licensed to XXX, Site ###.
NOTE: This session is executing on the ZZZ platform.
But perhaps this is intended for SAS/Studio or other processing where the the full log is not normally provided?
 
Also note that the DATETIME18. format is broken.  It should have room for 4 digit years, but it only displays the last 2 digits of the year.  So either use DATETIME19. to get 4 digit years or use DATETIME16. if you only need 2 digit years.