Is There a Way to Schedule URL to Content Updates?

Not sure if I’m understanding you correctly, but if you want to display a special of the day, depending on the day … I have a rough representation of how you could go about doing so.

Example:

$current_day = date('N');// 1 (for Monday) through 7 (for Sunday) - daily/weekly
//$current_day = date('j');// 1 to 31 - daily

$specials = array(
    '',
    'special 1',
    'special 2',
    'special 3',
    'special 4',
    'special 5',
    'special 6',
    'special 7',
    '23' => 'special 23',
    '24' => 'special 24',
    '25' => 'special 25'
);

if(array_key_exists($current_day, $specials) && !empty($specials[$current_day])){
    echo $specials[$current_day].PHP_EOL;
} else{
    echo 'There is no special today! :('.PHP_EOL;
}