Date argument as view filter
I've found that Drupal 6 views dont support such feature.

The solution was to implement the module_views_query_substitutions hook and alter the query manually:

function module_views_query_substitutions($view)
{
    $view-&gt;query-&gt;where[0]['clauses'][3] =
        str_replace('=', '&gt;=', $view-&gt;query-&gt;where[0]['clauses'][3]);
}