Zen dropdown

script.php

// The below command is creating a variable that loads the 'departures' template, and loads its children.
// I am curious as to where the date is getting it's instructions on how to display itself.
// Hoping you can shed some light onto the subject.

$departures = $page->get('template=departures')->children('template=departure');

<div class="ctaBox-departure">
  <label for="departure">
    <?=__('Departure Date')?>: </label>
  <select name="departure">
    <? foreach($departures as $departure): ?>
      <? if(!$departure->isClosed()): ?>
        <option value="<?= $departure->id ?>"> <?= $departure->departure_date ?> (<?= renderPrice($departure->getPrice()) ?>)</option>
      <? endif ?>
    <? endforeach ?>
  </select>
</div>