Roundcubemail change default format for date_short

If you want to change time show for mail in roundcubemail you need to do next:

[root@mail ~]# grep date_short /var/www/html/roundcubemail/config/config.inc.php
//$config['date_short'] = 'D H:i';
$config['date_short'] = 'd-m-Y H:i';

But no effect ? Go to Settings —–> Preferences —-> User Interfaces and uncheck “Pretty Dates” like picture below.

Roundcubemail date format