diff --git a/.changes/unreleased/Feature-20231018-113825.yaml b/.changes/unreleased/Feature-20231018-113825.yaml
new file mode 100644
index 000000000..f8922b356
--- /dev/null
+++ b/.changes/unreleased/Feature-20231018-113825.yaml
@@ -0,0 +1,6 @@
+kind: Feature
+body: '[export] Add a filter "grouping accompanying period by opening date" and "trouping
+  accompanying period by closing date"'
+time: 2023-10-18T11:38:25.80362952+02:00
+custom:
+  Issue: "172"
diff --git a/src/Bundle/ChillActivityBundle/Export/Aggregator/DateAggregator.php b/src/Bundle/ChillActivityBundle/Export/Aggregator/DateAggregator.php
index f7315140e..9d9e5ed61 100644
--- a/src/Bundle/ChillActivityBundle/Export/Aggregator/DateAggregator.php
+++ b/src/Bundle/ChillActivityBundle/Export/Aggregator/DateAggregator.php
@@ -73,7 +73,6 @@ class DateAggregator implements AggregatorInterface
             'choices' => self::CHOICES,
             'multiple' => false,
             'expanded' => true,
-            'empty_data' => self::DEFAULT_CHOICE,
         ]);
     }
 
diff --git a/src/Bundle/ChillPersonBundle/Export/Aggregator/AccompanyingCourseAggregators/ClosingDateAggregator.php b/src/Bundle/ChillPersonBundle/Export/Aggregator/AccompanyingCourseAggregators/ClosingDateAggregator.php
new file mode 100644
index 000000000..ce96c40c9
--- /dev/null
+++ b/src/Bundle/ChillPersonBundle/Export/Aggregator/AccompanyingCourseAggregators/ClosingDateAggregator.php
@@ -0,0 +1,88 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace Chill\PersonBundle\Export\Aggregator\AccompanyingCourseAggregators;
+
+use Chill\MainBundle\Export\AggregatorInterface;
+use Chill\PersonBundle\Export\Declarations;
+use Chill\PersonBundle\Export\Enum\DateGroupingChoiceEnum;
+use Chill\PersonBundle\Tests\Export\Aggregator\AccompanyingCourseAggregators\ClosingDateAggregatorTest;
+use Doctrine\ORM\QueryBuilder;
+use Symfony\Component\Form\Extension\Core\Type\ChoiceType;
+use Symfony\Component\Form\FormBuilderInterface;
+
+/**
+ * @see ClosingDateAggregatorTest
+ */
+final readonly class ClosingDateAggregator implements AggregatorInterface
+{
+    private const PREFIX = 'acp_closing_date_agg';
+
+    public function buildForm(FormBuilderInterface $builder): void
+    {
+        $builder->add('frequency', ChoiceType::class, [
+            'choices' => array_combine(
+                array_map(fn (DateGroupingChoiceEnum $c) => 'export.enum.frequency.'.$c->value, DateGroupingChoiceEnum::cases()),
+                array_map(fn (DateGroupingChoiceEnum $c) => $c->value, DateGroupingChoiceEnum::cases()),
+            ),
+            'label' => 'export.aggregator.course.by_closing_date.frequency',
+            'multiple' => false,
+            'expanded' => true,
+        ]);
+    }
+
+    public function getFormDefaultData(): array
+    {
+        return [
+            'frequency' => 'year',
+        ];
+    }
+
+    public function getLabels($key, array $values, mixed $data)
+    {
+        return function (null|string $value): string {
+            if ('_header' === $value) {
+                return 'export.aggregator.course.by_closing_date.header';
+            }
+
+            return (string) $value;
+        };
+    }
+
+    public function getQueryKeys($data)
+    {
+        return [self::PREFIX.'_closing_date'];
+    }
+
+    public function getTitle()
+    {
+        return 'export.aggregator.course.by_closing_date.title';
+    }
+
+    public function addRole(): ?string
+    {
+        return null;
+    }
+
+    public function alterQuery(QueryBuilder $qb, $data)
+    {
+        $p = self::PREFIX;
+
+        $qb->addSelect(sprintf("TO_CHAR(acp.closingDate, '%s') AS {$p}_closing_date", $data['frequency']));
+        $qb->addGroupBy("{$p}_closing_date");
+        $qb->addOrderBy("{$p}_closing_date", 'DESC');
+    }
+
+    public function applyOn()
+    {
+        return Declarations::ACP_TYPE;
+    }
+}
diff --git a/src/Bundle/ChillPersonBundle/Export/Aggregator/AccompanyingCourseAggregators/OpeningDateAggregator.php b/src/Bundle/ChillPersonBundle/Export/Aggregator/AccompanyingCourseAggregators/OpeningDateAggregator.php
new file mode 100644
index 000000000..bf71d04d8
--- /dev/null
+++ b/src/Bundle/ChillPersonBundle/Export/Aggregator/AccompanyingCourseAggregators/OpeningDateAggregator.php
@@ -0,0 +1,88 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace Chill\PersonBundle\Export\Aggregator\AccompanyingCourseAggregators;
+
+use Chill\MainBundle\Export\AggregatorInterface;
+use Chill\PersonBundle\Export\Declarations;
+use Chill\PersonBundle\Export\Enum\DateGroupingChoiceEnum;
+use Chill\PersonBundle\Tests\Export\Aggregator\AccompanyingCourseAggregators\OpeningDateAggregatorTest;
+use Doctrine\ORM\QueryBuilder;
+use Symfony\Component\Form\Extension\Core\Type\ChoiceType;
+use Symfony\Component\Form\FormBuilderInterface;
+
+/**
+ * @see OpeningDateAggregatorTest
+ */
+final readonly class OpeningDateAggregator implements AggregatorInterface
+{
+    private const PREFIX = 'acp_opening_date_agg';
+
+    public function buildForm(FormBuilderInterface $builder): void
+    {
+        $builder->add('frequency', ChoiceType::class, [
+            'choices' => array_combine(
+                array_map(fn (DateGroupingChoiceEnum $c) => 'export.enum.frequency.'.$c->value, DateGroupingChoiceEnum::cases()),
+                array_map(fn (DateGroupingChoiceEnum $c) => $c->value, DateGroupingChoiceEnum::cases()),
+            ),
+            'label' => 'export.aggregator.course.by_opening_date.frequency',
+            'multiple' => false,
+            'expanded' => true,
+        ]);
+    }
+
+    public function getFormDefaultData(): array
+    {
+        return [
+            'frequency' => 'year',
+        ];
+    }
+
+    public function getLabels($key, array $values, mixed $data)
+    {
+        return function (null|string $value): string {
+            if ('_header' === $value) {
+                return 'export.aggregator.course.by_opening_date.header';
+            }
+
+            return (string) $value;
+        };
+    }
+
+    public function getQueryKeys($data)
+    {
+        return [self::PREFIX.'_opening_date'];
+    }
+
+    public function getTitle()
+    {
+        return 'export.aggregator.course.by_opening_date.title';
+    }
+
+    public function addRole(): ?string
+    {
+        return null;
+    }
+
+    public function alterQuery(QueryBuilder $qb, $data)
+    {
+        $p = self::PREFIX;
+
+        $qb->addSelect(sprintf("TO_CHAR(acp.openingDate, '%s') AS {$p}_opening_date", $data['frequency']));
+        $qb->addGroupBy("{$p}_opening_date");
+        $qb->addOrderBy("{$p}_opening_date", 'DESC');
+    }
+
+    public function applyOn()
+    {
+        return Declarations::ACP_TYPE;
+    }
+}
diff --git a/src/Bundle/ChillPersonBundle/Export/Enum/DateGroupingChoiceEnum.php b/src/Bundle/ChillPersonBundle/Export/Enum/DateGroupingChoiceEnum.php
new file mode 100644
index 000000000..2b1ffc816
--- /dev/null
+++ b/src/Bundle/ChillPersonBundle/Export/Enum/DateGroupingChoiceEnum.php
@@ -0,0 +1,19 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace Chill\PersonBundle\Export\Enum;
+
+enum DateGroupingChoiceEnum: string
+{
+    case MONTH = 'YYYY-MM';
+    case WEEK = 'YYYY-IW';
+    case YEAR = 'YYYY';
+}
diff --git a/src/Bundle/ChillPersonBundle/Tests/Export/Aggregator/AccompanyingCourseAggregators/ClosingDateAggregatorTest.php b/src/Bundle/ChillPersonBundle/Tests/Export/Aggregator/AccompanyingCourseAggregators/ClosingDateAggregatorTest.php
new file mode 100644
index 000000000..ac7084de7
--- /dev/null
+++ b/src/Bundle/ChillPersonBundle/Tests/Export/Aggregator/AccompanyingCourseAggregators/ClosingDateAggregatorTest.php
@@ -0,0 +1,66 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace Chill\PersonBundle\Tests\Export\Aggregator\AccompanyingCourseAggregators;
+
+use Chill\MainBundle\Test\Export\AbstractAggregatorTest;
+use Chill\PersonBundle\Entity\AccompanyingPeriod;
+use Chill\PersonBundle\Export\Aggregator\AccompanyingCourseAggregators\ClosingDateAggregator;
+use Doctrine\ORM\EntityManagerInterface;
+
+/**
+ * @internal
+ *
+ * @coversNothing
+ */
+class ClosingDateAggregatorTest extends AbstractAggregatorTest
+{
+    private static ClosingDateAggregator $closingDateAggregator;
+
+    private static EntityManagerInterface $entityManager;
+
+    public static function setUpBeforeClass(): void
+    {
+        parent::setUpBeforeClass();
+        self::bootKernel();
+
+        self::$closingDateAggregator = self::$container->get(ClosingDateAggregator::class);
+        self::$entityManager = self::$container->get(EntityManagerInterface::class);
+    }
+
+    public function getAggregator()
+    {
+        return self::$closingDateAggregator;
+    }
+
+    public function getFormData()
+    {
+        yield ['frequency' => 'YYYY'];
+        yield ['frequency' => 'YYYY-MM'];
+        yield ['frequency' => 'YYYY-IV'];
+    }
+
+    public function getQueryBuilders()
+    {
+        self::bootKernel();
+        self::$entityManager = self::$container->get(EntityManagerInterface::class);
+
+        $data = [
+            self::$entityManager->createQueryBuilder()
+                ->select('count(acp.id)')
+                ->from(AccompanyingPeriod::class, 'acp'),
+        ];
+
+        self::ensureKernelShutdown();
+
+        return $data;
+    }
+}
diff --git a/src/Bundle/ChillPersonBundle/Tests/Export/Aggregator/AccompanyingCourseAggregators/OpeningDateAggregatorTest.php b/src/Bundle/ChillPersonBundle/Tests/Export/Aggregator/AccompanyingCourseAggregators/OpeningDateAggregatorTest.php
new file mode 100644
index 000000000..77d26b278
--- /dev/null
+++ b/src/Bundle/ChillPersonBundle/Tests/Export/Aggregator/AccompanyingCourseAggregators/OpeningDateAggregatorTest.php
@@ -0,0 +1,66 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace Chill\PersonBundle\Tests\Export\Aggregator\AccompanyingCourseAggregators;
+
+use Chill\MainBundle\Test\Export\AbstractAggregatorTest;
+use Chill\PersonBundle\Entity\AccompanyingPeriod;
+use Chill\PersonBundle\Export\Aggregator\AccompanyingCourseAggregators\OpeningDateAggregator;
+use Doctrine\ORM\EntityManagerInterface;
+
+/**
+ * @internal
+ *
+ * @coversNothing
+ */
+class OpeningDateAggregatorTest extends AbstractAggregatorTest
+{
+    private static OpeningDateAggregator $openingDateAggregator;
+
+    private static EntityManagerInterface $entityManager;
+
+    public static function setUpBeforeClass(): void
+    {
+        parent::setUpBeforeClass();
+        self::bootKernel();
+
+        self::$openingDateAggregator = self::$container->get(OpeningDateAggregator::class);
+        self::$entityManager = self::$container->get(EntityManagerInterface::class);
+    }
+
+    public function getAggregator()
+    {
+        return self::$openingDateAggregator;
+    }
+
+    public function getFormData()
+    {
+        yield ['frequency' => 'YYYY'];
+        yield ['frequency' => 'YYYY-MM'];
+        yield ['frequency' => 'YYYY-IV'];
+    }
+
+    public function getQueryBuilders()
+    {
+        self::bootKernel();
+        self::$entityManager = self::$container->get(EntityManagerInterface::class);
+
+        $data = [
+            self::$entityManager->createQueryBuilder()
+                ->select('count(acp.id)')
+                ->from(AccompanyingPeriod::class, 'acp'),
+        ];
+
+        self::ensureKernelShutdown();
+
+        return $data;
+    }
+}
diff --git a/src/Bundle/ChillPersonBundle/config/services/exports_accompanying_course.yaml b/src/Bundle/ChillPersonBundle/config/services/exports_accompanying_course.yaml
index c5a2dba68..4eaaf67b0 100644
--- a/src/Bundle/ChillPersonBundle/config/services/exports_accompanying_course.yaml
+++ b/src/Bundle/ChillPersonBundle/config/services/exports_accompanying_course.yaml
@@ -251,3 +251,11 @@ services:
     Chill\PersonBundle\Export\Aggregator\AccompanyingCourseAggregators\ScopeWorkingOnCourseAggregator:
         tags:
             - { name: chill.export_aggregator, alias: accompanyingcourse_scope_working_on_course_aggregator }
+
+    Chill\PersonBundle\Export\Aggregator\AccompanyingCourseAggregators\OpeningDateAggregator:
+        tags:
+            - { name: chill.export_aggregator, alias: accompanyingcourse_opening_date_aggregator }
+
+    Chill\PersonBundle\Export\Aggregator\AccompanyingCourseAggregators\ClosingDateAggregator:
+        tags:
+            - { name: chill.export_aggregator, alias: accompanyingcourse_closing_date_aggregator }
diff --git a/src/Bundle/ChillPersonBundle/translations/messages.fr.yml b/src/Bundle/ChillPersonBundle/translations/messages.fr.yml
index 097b5e79f..0c5a0fe57 100644
--- a/src/Bundle/ChillPersonBundle/translations/messages.fr.yml
+++ b/src/Bundle/ChillPersonBundle/translations/messages.fr.yml
@@ -981,6 +981,11 @@ notification:
 personId: Identifiant de l'usager
 
 export:
+    enum:
+        frequency:
+            YYYY-IW: par semaine
+            YYYY-MM: par mois
+            YYYY: par année
     export:
         acp_stats:
             avg_duration: Moyenne de la durée de participation de chaque usager concerné
@@ -1037,6 +1042,14 @@ export:
                 Calc date: Date de calcul du service de l'intervenant
             by_scope:
                 Group course by scope: Grouper les parcours par service
+            by_opening_date:
+                title: Grouper les parcours par date d'ouverture
+                frequency: Intervalle de regroupement
+                header: Date d'ouverture des parcours (période)
+            by_closing_date:
+                title: Grouper les parcours par date de cloture
+                frequency: Intervalle de regroupement
+                header: Date de cloture des parcours (période)
 
         course_work:
             by_treating_agent: