Example 1 - obtain the date stamp in yyyy-Mmm-dd format from ls output
# ls -lahe | awk '{printf "%s-%s-%s\n",,,}'
Example 2 - obtain the date and timestamp and file name from ls output
# ls -lahe | awk '{printf "%4s-%3s-%s:%2s:%2s:%2s %s\n",,,,substr(,1,2),substr(,4,2),substr(,7,2),}'