diff --git a/.changes/unreleased/Feature-20240617-152219.yaml b/.changes/unreleased/Feature-20240617-152219.yaml
new file mode 100644
index 000000000..cb5b93e0f
--- /dev/null
+++ b/.changes/unreleased/Feature-20240617-152219.yaml
@@ -0,0 +1,5 @@
+kind: Feature
+body: '[export] the aggregator "Group by referrer" now accept a date range.'
+time: 2024-06-17T15:22:19.030556768+02:00
+custom:
+  Issue: "282"
diff --git a/src/Bundle/ChillPersonBundle/Export/Aggregator/AccompanyingCourseAggregators/ReferrerAggregator.php b/src/Bundle/ChillPersonBundle/Export/Aggregator/AccompanyingCourseAggregators/ReferrerAggregator.php
index 78349dd56..925918e83 100644
--- a/src/Bundle/ChillPersonBundle/Export/Aggregator/AccompanyingCourseAggregators/ReferrerAggregator.php
+++ b/src/Bundle/ChillPersonBundle/Export/Aggregator/AccompanyingCourseAggregators/ReferrerAggregator.php
@@ -12,6 +12,7 @@ declare(strict_types=1);
 namespace Chill\PersonBundle\Export\Aggregator\AccompanyingCourseAggregators;
 
 use Chill\MainBundle\Export\AggregatorInterface;
+use Chill\MainBundle\Export\DataTransformerInterface;
 use Chill\MainBundle\Form\Type\PickRollingDateType;
 use Chill\MainBundle\Repository\UserRepository;
 use Chill\MainBundle\Service\RollingDate\RollingDate;
@@ -21,14 +22,17 @@ use Chill\PersonBundle\Export\Declarations;
 use Doctrine\ORM\QueryBuilder;
 use Symfony\Component\Form\FormBuilderInterface;
 
-final readonly class ReferrerAggregator implements AggregatorInterface
+final readonly class ReferrerAggregator implements AggregatorInterface, DataTransformerInterface
 {
     private const A = 'acp_ref_agg_uhistory';
 
     private const P = 'acp_ref_agg_date';
 
-    public function __construct(private UserRepository $userRepository, private UserRender $userRender, private RollingDateConverterInterface $rollingDateConverter)
-    {
+    public function __construct(
+        private UserRepository $userRepository,
+        private UserRender $userRender,
+        private RollingDateConverterInterface $rollingDateConverter
+    ) {
     }
 
     public function addRole(): ?string
@@ -46,18 +50,16 @@ final readonly class ReferrerAggregator implements AggregatorInterface
                 $qb->expr()->orX(
                     $qb->expr()->isNull(self::A),
                     $qb->expr()->andX(
-                        $qb->expr()->lte(self::A.'.startDate', ':'.self::P),
+                        $qb->expr()->lt(self::A.'.startDate', ':'.self::P.'_end_date'),
                         $qb->expr()->orX(
                             $qb->expr()->isNull(self::A.'.endDate'),
-                            $qb->expr()->gt(self::A.'.endDate', ':'.self::P)
+                            $qb->expr()->gte(self::A.'.endDate', ':'.self::P.'_start_date')
                         )
                     )
                 )
             )
-            ->setParameter(
-                self::P,
-                $this->rollingDateConverter->convert($data['date_calc'])
-            );
+            ->setParameter(':'.self::P.'_end_date', $this->rollingDateConverter->convert($data['end_date']))
+            ->setParameter(':'.self::P.'_start_date', $this->rollingDateConverter->convert($data['end_date']));
     }
 
     public function applyOn(): string
@@ -68,15 +70,37 @@ final readonly class ReferrerAggregator implements AggregatorInterface
     public function buildForm(FormBuilderInterface $builder)
     {
         $builder
-            ->add('date_calc', PickRollingDateType::class, [
-                'label' => 'export.aggregator.course.by_referrer.Computation date for referrer',
+            ->add('start_date', PickRollingDateType::class, [
+                'label' => 'export.aggregator.course.by_referrer.Referrer after',
+                'required' => true,
+            ])
+            ->add('end_date', PickRollingDateType::class, [
+                'label' => 'export.aggregator.course.by_referrer.Until',
                 'required' => true,
             ]);
     }
 
     public function getFormDefaultData(): array
     {
-        return ['date_calc' => new RollingDate(RollingDate::T_TODAY)];
+        return [
+            'start_date' => new RollingDate(RollingDate::T_YEAR_CURRENT_START),
+            'end_date' => new RollingDate(RollingDate::T_TODAY),
+        ];
+    }
+
+    public function transformData(?array $before): array
+    {
+        $default = $this->getFormDefaultData();
+        $data = [];
+
+        if (null === $before) {
+            return $default;
+        }
+
+        $data['start_date'] = $before['date_calc'] ?? $before['start_date'] ?? $default['start_date'];
+        $data['end_date'] = $before['date_calc'] ?? $before['end_date'] ?? $default['end_date'];
+
+        return $data;
     }
 
     public function getLabels($key, array $values, $data)
diff --git a/src/Bundle/ChillPersonBundle/Tests/Export/Aggregator/AccompanyingCourseAggregators/ReferrerAggregatorTest.php b/src/Bundle/ChillPersonBundle/Tests/Export/Aggregator/AccompanyingCourseAggregators/ReferrerAggregatorTest.php
index 8951b61eb..fade92c04 100644
--- a/src/Bundle/ChillPersonBundle/Tests/Export/Aggregator/AccompanyingCourseAggregators/ReferrerAggregatorTest.php
+++ b/src/Bundle/ChillPersonBundle/Tests/Export/Aggregator/AccompanyingCourseAggregators/ReferrerAggregatorTest.php
@@ -33,7 +33,40 @@ final class ReferrerAggregatorTest extends AbstractAggregatorTest
         $this->aggregator = self::$container->get('chill.person.export.aggregator_referrer');
     }
 
-    public function getAggregator()
+    /**
+     * @dataProvider provideBeforeData
+     */
+    public function testDataTransformer(?array $before, array $expected): void
+    {
+        $actual = $this->getAggregator()->transformData($before);
+
+        self::assertEqualsCanonicalizing(array_keys($expected), array_keys($actual));
+        foreach (['start_date', 'end_date'] as $key) {
+            self::assertInstanceOf(RollingDate::class, $actual[$key]);
+            self::assertEquals($expected[$key]->getRoll(), $actual[$key]->getRoll(), "Check that the roll is the same for {$key}");
+        }
+    }
+
+    public function provideBeforeData(): iterable
+    {
+        yield [
+            ['date_calc' => new RollingDate(RollingDate::T_TODAY)],
+            ['start_date' => new RollingDate(RollingDate::T_TODAY), 'end_date' => new RollingDate(RollingDate::T_TODAY)],
+        ];
+
+        yield [
+            ['start_date' => new RollingDate(RollingDate::T_WEEK_CURRENT_START), 'end_date' => new RollingDate(RollingDate::T_TODAY)],
+            ['start_date' => new RollingDate(RollingDate::T_WEEK_CURRENT_START), 'end_date' => new RollingDate(RollingDate::T_TODAY)],
+        ];
+
+        yield [
+            null,
+            // this is the default configuration
+            ['start_date' => new RollingDate(RollingDate::T_YEAR_CURRENT_START), 'end_date' => new RollingDate(RollingDate::T_TODAY)],
+        ];
+    }
+
+    public function getAggregator(): ReferrerAggregator
     {
         return $this->aggregator;
     }
@@ -41,7 +74,10 @@ final class ReferrerAggregatorTest extends AbstractAggregatorTest
     public function getFormData(): array
     {
         return [
-            ['date_calc' => new RollingDate(RollingDate::T_TODAY)],
+            [
+                'start_date' => new RollingDate(RollingDate::T_YEAR_CURRENT_START),
+                'end_date' => new RollingDate(RollingDate::T_TODAY),
+            ],
         ];
     }
 
diff --git a/src/Bundle/ChillPersonBundle/translations/messages.fr.yml b/src/Bundle/ChillPersonBundle/translations/messages.fr.yml
index bb40df9a9..fc95da2ea 100644
--- a/src/Bundle/ChillPersonBundle/translations/messages.fr.yml
+++ b/src/Bundle/ChillPersonBundle/translations/messages.fr.yml
@@ -1058,9 +1058,9 @@ export:
             by-user:
                 title: Grouper les parcours par usager participant
                 header: Usager participant
-
             by_referrer:
-                Computation date for referrer: Date à laquelle le référent était actif
+                Referrer after: Référent après le
+                Until: Jusqu'au
             by_user_scope:
                 Group course by referrer's scope: Grouper les parcours par service du référent
                 Referrer's scope: Service du référent de parcours