Query custom field with date

Question

According to the relevant article on the WordPress Codex, you should be able to add a type argument to the meta array. Resulting in something like this:

$meta_query = array(
    array(
        'key'       => 'date-available',
        'value'     => date("m/d/Y"),
        'compare'   => '<',
        'type'      => 'DATE'
    ),
);

It’s worth noting, though (as Gopalakrishnan18 mentioned), MySQL expects a date format of Y-m-d; so you may need to update the format of the date in the database.