rocketchat-auto-messages/config.example.php

<?php

$users = [
    'user1' => [
        'webhook' => 'https://rocketchat.instance.com/hooks/token',
        'year'      => '*',
        'month'     => '*',
        'day'       => '*',
        'hour'      => '*',
        'minute'    => '*',
        'daysOfWeek'=> '1,6',
        'message' => [
            "text" => "Hello!"
        ]
    ]
];