from the docs:
// fetch children with a date in the past
$items = $page->children()->filterBy('date', '<', time());
// fetch children with a date in the future
$items = $page->children()->filterBy('date', '>', time());
from the docs:
// fetch children with a date in the past
$items = $page->children()->filterBy('date', '<', time());
// fetch children with a date in the future
$items = $page->children()->filterBy('date', '>', time());