The "sixth" field (the rest of the line) specifies the command to be run.  The entire command portion
       of  the  line, up to a newline or a "%" character, will be executed by /bin/sh or by the shell speci-
       fied in the SHELL variable of the cronfile.  A "%" character in the command, unless  escaped  with  a
       backslash  (\),  will be changed into newline characters, and all data after the first % will be sent
       to the command as standard input.

lvl-suse:/tmp #  crontab -u lubomudr -l 
# DO NOT EDIT THIS FILE - edit the master and reinstall.
# (/tmp/crontab.O5wuh6 installed on Wed Dec 30 09:38:59 2015)
# (Cronie version 4.2)
39 9 * * *      touch /tmp/ttt`date +%Y%m`


lvl-suse:/tmp #  tail -1 /var/log/messages 
2015-12-30T09:39:01.693227+10:00 lvl-suse CRON[18451]: (lubomudr) CMD (touch /tmp/ttt`date +)