diff --git a/src/Bundle/ChillMainBundle/Service/RollingDate/RollingDate.php b/src/Bundle/ChillMainBundle/Service/RollingDate/RollingDate.php
index cc00c7777..7294e6816 100644
--- a/src/Bundle/ChillMainBundle/Service/RollingDate/RollingDate.php
+++ b/src/Bundle/ChillMainBundle/Service/RollingDate/RollingDate.php
@@ -77,7 +77,7 @@ class RollingDate
      * @param DateTimeImmutable|null $pivotDate Will be "now" if null is given
      * @param DateTimeImmutable|null $fixedDate Only to insert if $roll equals @see{self::T_FIXED_DATE}
      */
-    public function __construct(string $roll, ?DateTimeImmutable $pivotDate = null, ?DateTimeImmutable $fixedDate = null)
+    public function __construct(string $roll, ?DateTimeImmutable $fixedDate = null, ?DateTimeImmutable $pivotDate = null)
     {
         $this->roll = $roll;
         $this->pivotDate = $pivotDate ?? new DateTimeImmutable('now');
diff --git a/src/Bundle/ChillMainBundle/Service/RollingDate/RollingDateConverter.php b/src/Bundle/ChillMainBundle/Service/RollingDate/RollingDateConverter.php
new file mode 100644
index 000000000..e3cfb8e89
--- /dev/null
+++ b/src/Bundle/ChillMainBundle/Service/RollingDate/RollingDateConverter.php
@@ -0,0 +1,141 @@
+<?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\MainBundle\Service\RollingDate;
+
+use DateInterval;
+use DateTimeImmutable;
+use LogicException;
+use UnexpectedValueException;
+
+class RollingDateConverter
+{
+    public function convert(RollingDate $rollingDate): DateTimeImmutable
+    {
+        switch ($rollingDate->getRoll()) {
+            case RollingDate::T_MONTH_CURRENT_START:
+                return $this->toBeginOfMonth($rollingDate->getPivotDate());
+
+            case RollingDate::T_MONTH_NEXT_START:
+                return $this->toBeginOfMonth($rollingDate->getPivotDate()->add(new DateInterval('P1M')));
+
+            case RollingDate::T_MONTH_PREVIOUS_START:
+                return $this->toBeginOfMonth($rollingDate->getPivotDate()->sub(new DateInterval('P1M')));
+
+            case RollingDate::T_QUARTER_CURRENT_START:
+                return $this->toBeginOfQuarter($rollingDate->getPivotDate());
+
+            case RollingDate::T_QUARTER_NEXT_START:
+                return $this->toBeginOfQuarter($rollingDate->getPivotDate()->add(new DateInterval('P3M')));
+
+            case RollingDate::T_QUARTER_PREVIOUS_START:
+                return $this->toBeginOfQuarter($rollingDate->getPivotDate()->sub(new DateInterval('P3M')));
+
+            case RollingDate::T_WEEK_CURRENT_START:
+                return $this->toBeginOfWeek($rollingDate->getPivotDate());
+
+            case RollingDate::T_WEEK_NEXT_START:
+                return $this->toBeginOfWeek($rollingDate->getPivotDate()->add(new DateInterval('P1W')));
+
+            case RollingDate::T_WEEK_PREVIOUS_START:
+                return $this->toBeginOfWeek($rollingDate->getPivotDate()->sub(new DateInterval('P1W')));
+
+            case RollingDate::T_YEAR_CURRENT_START:
+                return $this->toBeginOfYear($rollingDate->getPivotDate());
+
+            case RollingDate::T_YEAR_PREVIOUS_START:
+                return $this->toBeginOfYear($rollingDate->getPivotDate()->sub(new DateInterval('P1Y')));
+
+            case RollingDate::T_YEAR_NEXT_START:
+                return $this->toBeginOfYear($rollingDate->getPivotDate()->add(new DateInterval('P1Y')));
+
+            case RollingDate::T_TODAY:
+                return $rollingDate->getPivotDate();
+
+            case RollingDate::T_FIXED_DATE:
+                if (null === $rollingDate->getFixedDate()) {
+                    throw new \LogicException("You must provide a fixed date when selecting a fixed date");
+                }
+                return $rollingDate->getFixedDate();
+
+            default:
+                throw new UnexpectedValueException(sprintf('%s rolling operation not supported', $rollingDate->getRoll()));
+        }
+    }
+
+    private function toBeginOfMonth(DateTimeImmutable $date): DateTimeImmutable
+    {
+        return DateTimeImmutable::createFromFormat(
+            'Y-m-d His',
+            sprintf('%s-%s-01 000000', $date->format('Y'), $date->format('m'))
+        );
+    }
+
+    private function toBeginOfQuarter(DateTimeImmutable $date): DateTimeImmutable
+    {
+        switch ((int) $date->format('n')) {
+            case 1:
+            case 2:
+            case 3:
+                $month = '01';
+
+                break;
+
+            case 4:
+            case 5:
+            case 6:
+                $month = '04';
+
+                break;
+
+            case 7:
+            case 8:
+            case 9:
+                $month = '07';
+
+                break;
+
+            case 10:
+            case 11:
+            case 12:
+                $month = '10';
+
+                break;
+
+            default:
+                throw new LogicException('this month is not valid: ' . $date->format('n'));
+        }
+
+        return DateTimeImmutable::createFromFormat(
+            'Y-m-d His',
+            sprintf('%s-%s-01 000000', $date->format('Y'), $month)
+        );
+    }
+
+    private function toBeginOfWeek(DateTimeImmutable $date): DateTimeImmutable
+    {
+        if (1 === $dayOfWeek = (int) $date->format('N')) {
+            return $date->setTime(0, 0, 0);
+        }
+
+        return $date
+            ->sub(new DateInterval('P' . ($dayOfWeek - 1) . 'D'))
+            ->setTime(0, 0, 0);
+    }
+
+    private function toBeginOfYear(DateTimeImmutable $date): DateTimeImmutable
+    {
+        return DateTimeImmutable::createFromFormat(
+            'Y-m-d His',
+            sprintf('%s-01-01 000000', $date->format('Y'))
+        );
+    }
+}
diff --git a/src/Bundle/ChillMainBundle/Tests/Services/RollingDate/RollingDateConverterTest.php b/src/Bundle/ChillMainBundle/Tests/Services/RollingDate/RollingDateConverterTest.php
new file mode 100644
index 000000000..6df2c889b
--- /dev/null
+++ b/src/Bundle/ChillMainBundle/Tests/Services/RollingDate/RollingDateConverterTest.php
@@ -0,0 +1,101 @@
+<?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 Services\RollingDate;
+
+use Chill\MainBundle\Service\RollingDate\RollingDate;
+use Chill\MainBundle\Service\RollingDate\RollingDateConverter;
+use DateTime;
+use DateTimeImmutable;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * @internal
+ * @coversNothing
+ */
+final class RollingDateConverterTest extends TestCase
+{
+    private RollingDateConverter $converter;
+
+    protected function setUp(): void
+    {
+        $this->converter = new RollingDateConverter();
+    }
+
+    public function generateDataConversionDate(): iterable
+    {
+        $format = 'Y-m-d His';
+
+        yield [RollingDate::T_MONTH_CURRENT_START, '2022-11-01 000000', $format];
+
+        yield [RollingDate::T_MONTH_NEXT_START, '2022-12-01 000000', $format];
+
+        yield [RollingDate::T_MONTH_PREVIOUS_START, '2022-10-01 000000', $format];
+
+        yield [RollingDate::T_QUARTER_CURRENT_START, '2022-10-01 000000', $format];
+
+        yield [RollingDate::T_QUARTER_NEXT_START, '2023-01-01 000000', $format];
+
+        yield [RollingDate::T_QUARTER_PREVIOUS_START, '2022-07-01 000000', $format];
+
+        yield [RollingDate::T_TODAY, '2022-11-07 000000', $format];
+
+        yield [RollingDate::T_WEEK_CURRENT_START, '2022-11-07 000000', $format];
+
+        yield [RollingDate::T_WEEK_NEXT_START, '2022-11-14 000000', $format];
+
+        yield [RollingDate::T_WEEK_PREVIOUS_START, '2022-10-31 000000', $format];
+
+        yield [RollingDate::T_YEAR_CURRENT_START, '2022-01-01 000000', $format];
+
+        yield [RollingDate::T_YEAR_NEXT_START, '2023-01-01 000000', $format];
+
+        yield [RollingDate::T_YEAR_PREVIOUS_START, '2021-01-01 000000', $format];
+    }
+
+    public function testConversionFixedDate()
+    {
+        $rollingDate = new RollingDate(RollingDate::T_FIXED_DATE, new DateTimeImmutable('2022-01-01'));
+
+        $this->assertEquals(
+            '2022-01-01',
+            $this->converter->convert($rollingDate)->format('Y-m-d')
+        );
+    }
+
+    public function testConvertOnDateNow()
+    {
+        $rollingDate = new RollingDate(RollingDate::T_YEAR_PREVIOUS_START);
+
+        $actual = $this->converter->convert($rollingDate);
+
+        $this->assertEquals(
+            (int) (new DateTimeImmutable('now'))->format('Y') - 1,
+            (int) $actual->format('Y')
+        );
+        $this->assertEquals(1, (int) $actual->format('m'));
+        $this->assertEquals(1, (int) $actual->format('d'));
+    }
+
+    /**
+     * @dataProvider generateDataConversionDate
+     */
+    public function testConvertOnPivotDate(string $roll, string $expectedDateTime, string $format)
+    {
+        $pivot = DateTimeImmutable::createFromFormat('Y-m-d His', '2022-11-07 000000');
+        $rollingDate = new RollingDate($roll, null, $pivot);
+
+        $this->assertEquals(
+            DateTime::createFromFormat($format, $expectedDateTime),
+            $this->converter->convert($rollingDate)
+        );
+    }
+}