diff --git a/docs/out/CalendarAPI.md b/docs/out/CalendarAPI.md
index 33e8a28d..5f3e9fe4 100644
--- a/docs/out/CalendarAPI.md
+++ b/docs/out/CalendarAPI.md
@@ -3,6 +3,7 @@
 ## Load all calendars:
 
 ```php
+        use CTApi\Models\Calendars\Appointment\Appointment;
         use CTApi\Models\Calendars\Appointment\AppointmentRequest;
         use CTApi\Models\Calendars\Calendar\CalendarRequest;
 
@@ -36,6 +37,7 @@
 ## Load appointments for calendar:
 
 ```php
+        use CTApi\Models\Calendars\Appointment\Appointment;
         use CTApi\Models\Calendars\Appointment\AppointmentRequest;
         use CTApi\Models\Calendars\Calendar\CalendarRequest;
 
@@ -43,9 +45,9 @@
         $lastCalendar = end($allCalendars);
 
         $appointments = $lastCalendar->requestAppointments()
-                ?->where("from", "2020-01-01")
-                ?->where("to", "2022-01-01")
-                ?->get() ?? [];
+            ?->where("from", "2020-01-01")
+            ?->where("to", "2022-01-01")
+            ?->get() ?? [];
         $lastAppointment = end($appointments);
 
         var_dump( $lastAppointment->getId());
@@ -129,6 +131,7 @@
 ## Load appointments for multiple calendars:
 
 ```php
+        use CTApi\Models\Calendars\Appointment\Appointment;
         use CTApi\Models\Calendars\Appointment\AppointmentRequest;
         use CTApi\Models\Calendars\Calendar\CalendarRequest;
 
@@ -139,6 +142,102 @@
 
 ```
 
+## Series appointments:
+
+```php
+        use CTApi\Models\Calendars\Appointment\Appointment;
+        use CTApi\Models\Calendars\Appointment\AppointmentRequest;
+        use CTApi\Models\Calendars\Calendar\CalendarRequest;
+
+        /**
+         * Load Seminar series:
+         * Consists of 2 series appointments
+         * - #1: Friday 03.11.2023
+         * - #2: Friday 10.11.2023
+         */
+        $appointments = $this->loadSeriesAppointments();
+
+        $firstSeriesAppointment = $appointments[0];
+        $secondSeriesAppointment = $appointments[1];
+
+        /**
+         * ID PROPERTY:
+         * For every calculated series appointment the id stays the same as the base appointment:
+         */
+        var_dump( $firstSeriesAppointment->getId());
+        // Output: 15
+
+        var_dump( $firstSeriesAppointment->getId());
+        // Output: 15
+
+
+        /**
+         * START_DATE / END_DATE PROPERTY:
+         * Shows the start date / end date of the series appointment.
+         */
+        var_dump( $firstSeriesAppointment->getStartDate());
+        // Output: "2023-11-03T17:00:00Z"
+
+        var_dump( $firstSeriesAppointment->getEndDate());
+        // Output: "2023-11-03T18:30:00Z"
+
+
+        var_dump( $secondSeriesAppointment->getStartDate());
+        // Output: "2023-11-10T17:00:00Z"
+
+        var_dump( $secondSeriesAppointment->getEndDate());
+        // Output: "2023-11-10T18:30:00Z"
+
+
+        /**
+         * BASE START_DATE / END_DATE PROPERTY:
+         * Refers for every appointment to the base appointment, where the series starts:
+         */
+        var_dump( $firstSeriesAppointment->getBaseStartDate());
+        // Output: "2023-11-03T17:00:00Z"
+
+        var_dump( $firstSeriesAppointment->getBaseEndDate());
+        // Output: "2023-11-03T18:30:00Z"
+
+
+        var_dump( $secondSeriesAppointment->getBaseStartDate());
+        // Output: "2023-11-03T17:00:00Z"
+
+        var_dump( $secondSeriesAppointment->getBaseEndDate());
+        // Output: "2023-11-03T18:30:00Z"
+
+
+        /**
+         * CALCULATED START_DATE / END_DATE PROPERTY:
+         * Same as default startDate / endDate property. Contains the calculated date for the specific appointment.
+         */
+        var_dump( $firstSeriesAppointment->getCalculatedStartDate());
+        // Output: "2023-11-03T17:00:00Z"
+
+        var_dump( $firstSeriesAppointment->getCalculatedEndDate());
+        // Output: "2023-11-03T18:30:00Z"
+
+
+        var_dump( $secondSeriesAppointment->getCalculatedStartDate());
+        // Output: "2023-11-10T17:00:00Z"
+
+        var_dump( $secondSeriesAppointment->getCalculatedEndDate());
+        // Output: "2023-11-10T18:30:00Z"
+
+
+        /**
+         * DATE_TIME:
+         * All string properties can be casted to date time.
+         */
+        $firstSeriesAppointment->getStartDateAsDateTime();
+        $firstSeriesAppointment->getBaseStartDateAsDateTime();
+        $firstSeriesAppointment->getCalculatedStartDateAsDateTime();
+        $firstSeriesAppointment->getEndDateAsDateTime();
+        $firstSeriesAppointment->getBaseEndDateAsDateTime();
+        $firstSeriesAppointment->getCalculatedEndDateAsDateTime();
+
+```
+
 ## Load appointment with event and bookings (CombinedAppointment):
 
 Load single appointment including the event and bookings for this appointment.
diff --git a/docs/src/ressources/CalendarAPI.md b/docs/src/ressources/CalendarAPI.md
index 59c1d5ab..ba81bf56 100644
--- a/docs/src/ressources/CalendarAPI.md
+++ b/docs/src/ressources/CalendarAPI.md
@@ -12,6 +12,10 @@
 
 {{ \CTApi\Test\Unit\Docs\CalendarRequestTest.testGetAppointmentsViaBuilder }}
 
+## Series appointments:
+
+{{ \CTApi\Test\Unit\Docs\CalendarRequestTest.testGetSeriesAppointments}}
+
 ## Load appointment with event and bookings (CombinedAppointment):
 
 Load single appointment including the event and bookings for this appointment.
diff --git a/tests/Integration/Requests/CalendarRequestTest.php b/tests/Integration/Requests/CalendarRequestTest.php
index b5c05fd7..e260483b 100644
--- a/tests/Integration/Requests/CalendarRequestTest.php
+++ b/tests/Integration/Requests/CalendarRequestTest.php
@@ -4,6 +4,8 @@
 namespace CTApi\Test\Integration\Requests;
 
 
+use CTApi\CTLog;
+use CTApi\Models\Calendars\Appointment\Appointment;
 use CTApi\Models\Calendars\Appointment\AppointmentRequest;
 use CTApi\Models\Calendars\Calendar\CalendarRequest;
 use CTApi\Models\Calendars\CombinedAppointment\CombinedAppointmentRequest;
@@ -100,4 +102,39 @@ public function testCombinedAppointmentRequest()
         $this->assertEqualsTestData("combined_appointment", "any_booking.resource.id", $oneBooking->getResource()?->getId());
         $this->assertEqualsTestData("combined_appointment", "any_booking.resource.name", $oneBooking->getResource()?->getName());
     }
+
+    public function testSeriesAppointment()
+    {
+        $testCase = IntegrationTestData::getTestCase("appointment_series");
+
+        $calendar_id = $testCase->getFilterAsInt("calendar_id");
+        $from = $testCase->getFilter("from");
+        $to = $testCase->getFilter("to");
+
+        $appointments = AppointmentRequest::forCalendar($calendar_id)
+            ->where("from", $from)
+            ->where("to", $to)->get();
+
+        $this->assertTrue(sizeof($appointments) >= 2);
+
+        $firstSeriesAppointment = null;
+        $first_startDate = $testCase->getResult("first_series_appointment.calculated_start_date");
+        $secondSeriesAppointment = null;
+        $second_startDate = $testCase->getResult("second_series_appointment.calculated_start_date");
+
+        foreach($appointments as $appointment){
+            if($first_startDate === $appointment->getStartDate()){
+                $firstSeriesAppointment = $appointment;
+            }
+            if($second_startDate === $appointment->getStartDate()){
+                $secondSeriesAppointment = $appointment;
+            }
+        }
+
+        $this->assertNotNull($firstSeriesAppointment);
+        $this->assertEquals($testCase->getResult("first_series_appointment.base_start_date"), $firstSeriesAppointment->getBaseStartDate());
+
+        $this->assertNotNull($secondSeriesAppointment);
+        $this->assertEquals($testCase->getResult("second_series_appointment.base_start_date"), $secondSeriesAppointment->getBaseStartDate());
+    }
 }
\ No newline at end of file
diff --git a/tests/Integration/integration-test-data.json b/tests/Integration/integration-test-data.json
index 7b3925b5..11a36f03 100644
--- a/tests/Integration/integration-test-data.json
+++ b/tests/Integration/integration-test-data.json
@@ -391,6 +391,26 @@
         }
       }
     },
+    "appointment_series": {
+      "description": "Filter series appointment.",
+      "filter": {
+        "calendar_id": 2,
+        "from": "2023-11-02",
+        "to": "2023-11-11"
+      },
+      "result": {
+        "first_series_appointment": {
+          "id": 14,
+          "base_start_date": "2023-11-03T17:00:00Z",
+          "calculated_start_date": "2023-11-03T17:00:00Z"
+        },
+        "second_series_appointment": {
+          "id": 14,
+          "base_start_date": "2023-11-03T17:00:00Z",
+          "calculated_start_date": "2023-11-10T17:00:00Z"
+        }
+      }
+    },
     "permission_group": {
       "description": "Load permission for group.",
       "filter": {
diff --git a/tests/Unit/Docs/CalendarRequestTest.php b/tests/Unit/Docs/CalendarRequestTest.php
index c9b3cc85..0a04ada3 100644
--- a/tests/Unit/Docs/CalendarRequestTest.php
+++ b/tests/Unit/Docs/CalendarRequestTest.php
@@ -4,6 +4,7 @@
 namespace CTApi\Test\Unit\Docs;
 
 
+use CTApi\Models\Calendars\Appointment\Appointment;
 use CTApi\Models\Calendars\Appointment\AppointmentRequest;
 use CTApi\Models\Calendars\Calendar\CalendarRequest;
 use CTApi\Test\Unit\TestCaseHttpMocked;
@@ -31,9 +32,9 @@ public function testGetApppointments()
         $lastCalendar = end($allCalendars);
 
         $appointments = $lastCalendar->requestAppointments()
-                ?->where("from", "2020-01-01")
-                ?->where("to", "2022-01-01")
-                ?->get() ?? [];
+            ?->where("from", "2020-01-01")
+            ?->where("to", "2022-01-01")
+            ?->get() ?? [];
         $lastAppointment = end($appointments);
 
         $this->assertEquals(848, $lastAppointment->getId());
@@ -78,4 +79,77 @@ public function testGetAppointmentsViaBuilder()
             ->where("to", "2022-02-01")->get();
     }
 
+
+    public function testGetSeriesAppointments()
+    {
+        /**
+         * Load Seminar series:
+         * Consists of 2 series appointments
+         * - #1: Friday 03.11.2023
+         * - #2: Friday 10.11.2023
+         */
+        $appointments = $this->loadSeriesAppointments();
+
+        $firstSeriesAppointment = $appointments[0];
+        $secondSeriesAppointment = $appointments[1];
+
+        /**
+         * ID PROPERTY:
+         * For every calculated series appointment the id stays the same as the base appointment:
+         */
+        $this->assertEquals(15, $firstSeriesAppointment->getId());
+        $this->assertEquals(15, $firstSeriesAppointment->getId());
+
+        /**
+         * START_DATE / END_DATE PROPERTY:
+         * Shows the start date / end date of the series appointment.
+         */
+        $this->assertEquals("2023-11-03T17:00:00Z", $firstSeriesAppointment->getStartDate());
+        $this->assertEquals("2023-11-03T18:30:00Z", $firstSeriesAppointment->getEndDate());
+
+        $this->assertEquals("2023-11-10T17:00:00Z", $secondSeriesAppointment->getStartDate());
+        $this->assertEquals("2023-11-10T18:30:00Z", $secondSeriesAppointment->getEndDate());
+
+        /**
+         * BASE START_DATE / END_DATE PROPERTY:
+         * Refers for every appointment to the base appointment, where the series starts:
+         */
+        $this->assertEquals("2023-11-03T17:00:00Z", $firstSeriesAppointment->getBaseStartDate());
+        $this->assertEquals("2023-11-03T18:30:00Z", $firstSeriesAppointment->getBaseEndDate());
+
+        $this->assertEquals("2023-11-03T17:00:00Z", $secondSeriesAppointment->getBaseStartDate());
+        $this->assertEquals("2023-11-03T18:30:00Z", $secondSeriesAppointment->getBaseEndDate());
+
+        /**
+         * CALCULATED START_DATE / END_DATE PROPERTY:
+         * Same as default startDate / endDate property. Contains the calculated date for the specific appointment.
+         */
+        $this->assertEquals("2023-11-03T17:00:00Z", $firstSeriesAppointment->getCalculatedStartDate());
+        $this->assertEquals("2023-11-03T18:30:00Z", $firstSeriesAppointment->getCalculatedEndDate());
+
+        $this->assertEquals("2023-11-10T17:00:00Z", $secondSeriesAppointment->getCalculatedStartDate());
+        $this->assertEquals("2023-11-10T18:30:00Z", $secondSeriesAppointment->getCalculatedEndDate());
+
+        /**
+         * DATE_TIME:
+         * All string properties can be casted to date time.
+         */
+        $firstSeriesAppointment->getStartDateAsDateTime();
+        $firstSeriesAppointment->getBaseStartDateAsDateTime();
+        $firstSeriesAppointment->getCalculatedStartDateAsDateTime();
+        $firstSeriesAppointment->getEndDateAsDateTime();
+        $firstSeriesAppointment->getBaseEndDateAsDateTime();
+        $firstSeriesAppointment->getCalculatedEndDateAsDateTime();
+    }
+
+    /**
+     * @return Appointment[]
+     */
+    private function loadSeriesAppointments(): array
+    {
+        $fileContent = file_get_contents(__DIR__ . '/calendar_request_series_appointments.json');
+        $json = json_decode($fileContent, true);
+        return Appointment::createModelsFromArray($json["data"]);
+    }
+
 }
\ No newline at end of file
diff --git a/tests/Unit/Docs/calendar_request_series_appointments.json b/tests/Unit/Docs/calendar_request_series_appointments.json
new file mode 100644
index 00000000..4a667641
--- /dev/null
+++ b/tests/Unit/Docs/calendar_request_series_appointments.json
@@ -0,0 +1,121 @@
+{
+    "data": [
+        {
+            "base": {
+                "id": 15,
+                "caption": "Seminar series",
+                "note": "Letters to the first Christian churches",
+                "address": null,
+                "version": 0,
+                "calendar": {
+                    "id": 3,
+                    "name": "Gottesdienst",
+                    "nameTranslated": "Gottesdienst",
+                    "sortKey": 10,
+                    "color": "black",
+                    "isPublic": true,
+                    "isPrivate": false,
+                    "randomUrl": "30a2d4d8ea19c0a52c54ef59d1b76196",
+                    "iCalSourceUrl": null,
+                    "campusId": null,
+                    "eventTemplateId": null,
+                    "meta": {
+                        "modifiedDate": "2023-05-03T11:59:11Z",
+                        "modifiedPid": -1
+                    }
+                },
+                "information": "",
+                "image": null,
+                "link": "",
+                "isInternal": false,
+                "startDate": "2023-11-03T17:00:00Z",
+                "endDate": "2023-11-03T18:30:00Z",
+                "allDay": false,
+                "repeatId": 7,
+                "repeatFrequency": 1,
+                "repeatUntil": "2023-11-10",
+                "repeatOption": null,
+                "additionals": [],
+                "exceptions": [],
+                "signup": null,
+                "meta": {
+                    "createdDate": "2023-11-03T07:27:38Z",
+                    "createdPerson": {
+                        "id": 1
+                    },
+                    "modifiedDate": "2023-11-03T07:27:38Z",
+                    "modifiedPerson": {
+                        "id": 1
+                    }
+                },
+                "onBehalfOfPid": null,
+                "@deprecated": "additions",
+                "additions": []
+            },
+            "calculated": {
+                "startDate": "2023-11-03T17:00:00Z",
+                "endDate": "2023-11-03T18:30:00Z"
+            }
+        },
+        {
+            "base": {
+                "id": 15,
+                "caption": "Seminar series",
+                "note": "Letters to the first Christian churches",
+                "address": null,
+                "version": 0,
+                "calendar": {
+                    "id": 3,
+                    "name": "Gottesdienst",
+                    "nameTranslated": "Gottesdienst",
+                    "sortKey": 10,
+                    "color": "black",
+                    "isPublic": true,
+                    "isPrivate": false,
+                    "randomUrl": "30a2d4d8ea19c0a52c54ef59d1b76196",
+                    "iCalSourceUrl": null,
+                    "campusId": null,
+                    "eventTemplateId": null,
+                    "meta": {
+                        "modifiedDate": "2023-05-03T11:59:11Z",
+                        "modifiedPid": -1
+                    }
+                },
+                "information": "",
+                "image": null,
+                "link": "",
+                "isInternal": false,
+                "startDate": "2023-11-03T17:00:00Z",
+                "endDate": "2023-11-03T18:30:00Z",
+                "allDay": false,
+                "repeatId": 7,
+                "repeatFrequency": 1,
+                "repeatUntil": "2023-11-10",
+                "repeatOption": null,
+                "additionals": [],
+                "exceptions": [],
+                "signup": null,
+                "meta": {
+                    "createdDate": "2023-11-03T07:27:38Z",
+                    "createdPerson": {
+                        "id": 1
+                    },
+                    "modifiedDate": "2023-11-03T07:27:38Z",
+                    "modifiedPerson": {
+                        "id": 1
+                    }
+                },
+                "onBehalfOfPid": null,
+                "@deprecated": "additions",
+                "additions": []
+            },
+            "calculated": {
+                "startDate": "2023-11-10T17:00:00Z",
+                "endDate": "2023-11-10T18:30:00Z"
+            }
+        }
+    ],
+    "meta": {
+        "count": 2
+    }
+}
\ No newline at end of file