lamine_wp/web/app/themes/la_mine/agenda.php

<?php
/**
 * template name: agenda
 */
$context = Timber::context();
$context['term_page'] = new Timber\Term();
// $today = date('Y-m-d H:i:s');

$args = array(
    'post_type' => 'post',
    'post_status'=>'publish',
    'orderby' => 'meta_value',
    'meta_key' => 'informations_debut_event',
    'order' => 'ASC',
);

$context['post'] = Timber::get_post();
$context['posts'] = Timber::get_posts( $args );

Timber::render('agenda.twig', $context );