File modification time (seconds) on Unix

I found this:

ls --time-style="+%d-%m-%Y %H:%M:%S" -l

Which exports something like this:

root:~# ls --time-style="+%d-%m-%Y %H:%M:%S" -l
total 0
-rw-r--r-- 1 root root 0 16-04-2015 23:14:02 other-file.txt
-rw-r--r-- 1 root root 0 16-04-2015 23:13:58 test.txt