looking for files modified some time back in a dir and its subdir

$ find . -type f -print0 | xargs -0 stat -c’%Y :%y %12s %n’ | sort -nr | cut -d: -f2- | head

Will go through all the files in the directory specified, uses `stat` to print out last modification time, then sorts numerically in reverse, then uses cut to remove the modified epoch timestamp and finally head to only output the last 10 modified files.