diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
new file mode 100644
index 0000000..ddf603b
--- /dev/null
+++ b/.gitlab-ci.yml
@@ -0,0 +1,55 @@
+stages:
+  - build
+  - test
+  - docker
+
+build-backend:
+  image: golang:1.21-alpine
+  stage: build
+  rules:
+    - changes:
+      - backend/**/*
+  script:
+    - cd backend
+    - go build -o htwkalender
+  artifacts:
+    paths:
+      - backend/htwkalender
+      - backend/go.sum
+      - backend/go.mod
+
+test:
+  image: golang:1.21-alpine
+  stage: test
+  rules:
+    - changes:
+      - backend/**/*
+  script:
+    - cd backend
+    - go test -v ./...
+  dependencies:
+    - build-backend
+
+build-backend-image:
+  stage: docker
+  image: docker:20.10.16
+  services:
+    - name: docker:20.10.16-dind
+      alias: docker
+  tags:
+    - image
+  variables:
+    IMAGE_TAG: $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG
+    DOCKER_HOST: tcp://docker:2376
+    DOCKER_TLS_CERTDIR: "/certs"
+    DOCKER_TLS_VERIFY: 1
+    DOCKER_CERT_PATH: "/certs/client"
+  script:
+    - cd backend
+    - docker login -u $CI_DOCKER_REGISTRY_USER -p $CI_DOCKER_REGISTRY_PASSWORD $CI_DOCKER_REGISTRY
+    - docker build -t htwkalender-backend$IMAGE_TAG .
+    - docker tag htwkalender-backend$IMAGE_TAG $CI_DOCKER_REGISTRY_USER/htwkalender:backend
+    - docker push $CI_DOCKER_REGISTRY_USER/htwkalender:backend
+  only:
+    - main
+    - development
diff --git a/backend/Dockerfile b/backend/Dockerfile
index 655af93..49f26d9 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -9,7 +9,7 @@ RUN go mod download
 
 # Copy the source from the current directory to the Working Directory inside the container
 COPY *.go ./
-COPY .. .
+COPY . .
 
 # Build the Go app
 RUN CGO_ENABLED=0 GOOS=linux go build -o /htwkalender
diff --git a/backend/model/eventModel_test.go b/backend/model/eventModel_test.go
index 9608ba5..bbddeac 100644
--- a/backend/model/eventModel_test.go
+++ b/backend/model/eventModel_test.go
@@ -9,6 +9,8 @@ import (
 )
 
 func TestEvents_Contains(t *testing.T) {
+	specificTime, _ := types.ParseDateTime("2020-01-01 12:00:00.000Z")
+
 	type args struct {
 		event Event
 	}
@@ -26,20 +28,20 @@ func TestEvents_Contains(t *testing.T) {
 		},
 		{
 			name: "one event",
-			m:    Events{{Day: "test", Week: "test", Start: types.NowDateTime(), End: types.NowDateTime(), Name: "test", Course: "test", Prof: "test", Rooms: "test", EventType: "test"}},
-			args: args{event: Event{Day: "test", Week: "test", Start: types.NowDateTime(), End: types.NowDateTime(), Name: "test", Course: "test", Prof: "test", Rooms: "test", EventType: "test"}},
+			m:    Events{{Day: "test", Week: "test", Start: specificTime, End: specificTime, Name: "test", Course: "test", Prof: "test", Rooms: "test", EventType: "test"}},
+			args: args{event: Event{Day: "test", Week: "test", Start: specificTime, End: specificTime, Name: "test", Course: "test", Prof: "test", Rooms: "test", EventType: "test"}},
 			want: true,
 		},
 		{
 			name: "two events",
-			m:    Events{{Day: "test", Week: "test", Start: types.NowDateTime(), End: types.NowDateTime(), Name: "test", Course: "test", Prof: "test", Rooms: "test", EventType: "test"}, {Day: "test2", Week: "test2", Start: types.NowDateTime(), End: types.NowDateTime(), Name: "test2", Course: "test2", Prof: "test2", Rooms: "test2", EventType: "test2"}},
-			args: args{event: Event{Day: "test2", Week: "test2", Start: types.NowDateTime(), End: types.NowDateTime(), Name: "test2", Course: "test2", Prof: "test2", Rooms: "test2", EventType: "test2"}},
+			m:    Events{{Day: "test", Week: "test", Start: specificTime, End: specificTime, Name: "test", Course: "test", Prof: "test", Rooms: "test", EventType: "test"}, {Day: "test2", Week: "test2", Start: specificTime, End: specificTime, Name: "test2", Course: "test2", Prof: "test2", Rooms: "test2", EventType: "test2"}},
+			args: args{event: Event{Day: "test2", Week: "test2", Start: specificTime, End: specificTime, Name: "test2", Course: "test2", Prof: "test2", Rooms: "test2", EventType: "test2"}},
 			want: true,
 		},
 		{
 			name: "two events with different values",
-			m:    Events{{Day: "test", Week: "test", Start: types.NowDateTime(), End: types.NowDateTime(), Name: "test", Course: "test", Prof: "test", Rooms: "test", EventType: "test", UUID: "439ßu56rf8u9ijn4f4-2345345"}, {Day: "test2", Week: "test2", Start: types.NowDateTime(), End: types.NowDateTime(), Name: "test2", Course: "test2", Prof: "test2", Rooms: "test2", EventType: "test2", UUID: "432a39ßu545349ijn4f4-23dsa45"}},
-			args: args{event: Event{Day: "test3", Week: "test3", Start: types.NowDateTime(), End: types.NowDateTime(), Name: "test3", Course: "test3", Prof: "test3", Rooms: "test3", EventType: "test3", UUID: "934mf43r34f-g68h7655tg3"}},
+			m:    Events{{Day: "test", Week: "test", Start: specificTime, End: specificTime, Name: "test", Course: "test", Prof: "test", Rooms: "test", EventType: "test", UUID: "439ßu56rf8u9ijn4f4-2345345"}, {Day: "test2", Week: "test2", Start: specificTime, End: specificTime, Name: "test2", Course: "test2", Prof: "test2", Rooms: "test2", EventType: "test2", UUID: "432a39ßu545349ijn4f4-23dsa45"}},
+			args: args{event: Event{Day: "test3", Week: "test3", Start: specificTime, End: specificTime, Name: "test3", Course: "test3", Prof: "test3", Rooms: "test3", EventType: "test3", UUID: "934mf43r34f-g68h7655tg3"}},
 			want: false,
 		},
 	}
@@ -53,6 +55,8 @@ func TestEvents_Contains(t *testing.T) {
 }
 
 func TestEvent_Equals(t *testing.T) {
+	specificTime, _ := types.ParseDateTime("2020-01-01 12:00:00.000Z")
+
 	type fields struct {
 		UUID      string
 		Day       string
@@ -86,20 +90,20 @@ func TestEvent_Equals(t *testing.T) {
 		},
 		{
 			name:   "one empty one not",
-			fields: fields{Day: "test", Week: "test", Start: types.NowDateTime(), End: types.NowDateTime(), Name: "test", Course: "test", Prof: "test", Rooms: "test", EventType: "test"},
+			fields: fields{Day: "test", Week: "test", Start: specificTime, End: specificTime, Name: "test", Course: "test", Prof: "test", Rooms: "test", EventType: "test"},
 			args:   args{event: Event{}},
 			want:   false,
 		},
 		{
 			name:   "one event",
-			fields: fields{Day: "test", Week: "test", Start: types.NowDateTime(), End: types.NowDateTime(), Name: "test", Course: "test", Prof: "test", Rooms: "test", EventType: "test"},
-			args:   args{event: Event{Day: "test", Week: "test", Start: types.NowDateTime(), End: types.NowDateTime(), Name: "test", Course: "test", Prof: "test", Rooms: "test", EventType: "test"}},
+			fields: fields{Day: "test", Week: "test", Start: specificTime, End: specificTime, Name: "test", Course: "test", Prof: "test", Rooms: "test", EventType: "test"},
+			args:   args{event: Event{Day: "test", Week: "test", Start: specificTime, End: specificTime, Name: "test", Course: "test", Prof: "test", Rooms: "test", EventType: "test"}},
 			want:   true,
 		},
 		{
 			name:   "two events",
-			fields: fields{Day: "test", Week: "test", Start: types.NowDateTime(), End: types.NowDateTime(), Name: "test", Course: "test", Prof: "test", Rooms: "test", EventType: "test"},
-			args:   args{event: Event{Day: "test2", Week: "test2", Start: types.NowDateTime(), End: types.NowDateTime(), Name: "test2", Course: "test2", Prof: "test2", Rooms: "test2", EventType: "test2"}},
+			fields: fields{Day: "test", Week: "test", Start: specificTime, End: specificTime, Name: "test", Course: "test", Prof: "test", Rooms: "test", EventType: "test"},
+			args:   args{event: Event{Day: "test2", Week: "test2", Start: specificTime, End: specificTime, Name: "test2", Course: "test2", Prof: "test2", Rooms: "test2", EventType: "test2"}},
 			want:   false,
 		},
 	}
diff --git a/backend/service/date/dateFormat_test.go b/backend/service/date/dateFormat_test.go
index 32fc99f..7566353 100644
--- a/backend/service/date/dateFormat_test.go
+++ b/backend/service/date/dateFormat_test.go
@@ -7,6 +7,8 @@ import (
 )
 
 func Test_getDateFromWeekNumber(t *testing.T) {
+	europeTime, _ := time.LoadLocation("Europe/Berlin")
+
 	type args struct {
 		year       int
 		weekNumber int
@@ -25,7 +27,7 @@ func Test_getDateFromWeekNumber(t *testing.T) {
 				weekNumber: 1,
 				dayName:    "Montag",
 			},
-			want:    time.Date(2021, 1, 4, 0, 0, 0, 0, time.UTC),
+			want:    time.Date(2021, 1, 4, 0, 0, 0, 0, europeTime),
 			wantErr: false,
 		},
 		{
@@ -35,7 +37,7 @@ func Test_getDateFromWeekNumber(t *testing.T) {
 				weekNumber: 57,
 				dayName:    "Montag",
 			},
-			want:    time.Date(2024, 1, 29, 0, 0, 0, 0, time.UTC),
+			want:    time.Date(2024, 1, 29, 0, 0, 0, 0, europeTime),
 			wantErr: false,
 		},
 		{
@@ -45,7 +47,7 @@ func Test_getDateFromWeekNumber(t *testing.T) {
 				weekNumber: 1,
 				dayName:    "Montag",
 			},
-			want:    time.Date(2023, 1, 2, 0, 0, 0, 0, time.UTC),
+			want:    time.Date(2023, 1, 2, 0, 0, 0, 0, europeTime),
 			wantErr: false,
 		},
 	}
diff --git a/backend/service/fetch/v1/fetchSeminarEventService_test.go b/backend/service/fetch/v1/fetchSeminarEventService_test.go
index 3811b85..b86e6e8 100644
--- a/backend/service/fetch/v1/fetchSeminarEventService_test.go
+++ b/backend/service/fetch/v1/fetchSeminarEventService_test.go
@@ -267,7 +267,6 @@ func Test_generateUUIDs(t *testing.T) {
 }
 
 func Test_createTimeFromHourAndMinuteString(t *testing.T) {
-	europeTime, _ := time.LoadLocation("Europe/Berlin")
 	type args struct {
 		tableTime string
 	}
@@ -281,21 +280,21 @@ func Test_createTimeFromHourAndMinuteString(t *testing.T) {
 			args: args{
 				tableTime: "08:00",
 			},
-			want: time.Date(0, 0, 0, 8, 0, 0, 0, europeTime),
+			want: time.Date(0, 0, 0, 8, 0, 0, 0, time.UTC),
 		},
 		{
 			name: "Test 2",
 			args: args{
 				tableTime: "08:15",
 			},
-			want: time.Date(0, 0, 0, 8, 15, 0, 0, europeTime),
+			want: time.Date(0, 0, 0, 8, 15, 0, 0, time.UTC),
 		},
 		{
 			name: "Test 3",
 			args: args{
 				tableTime: "08:30",
 			},
-			want: time.Date(0, 0, 0, 8, 30, 0, 0, europeTime),
+			want: time.Date(0, 0, 0, 8, 30, 0, 0, time.UTC),
 		},
 	}
 	for _, tt := range tests {