diff --git a/web/ts/api/admin-lecture-list.ts b/web/ts/api/admin-lecture-list.ts
index 94d8e853b..bdd4fd82a 100644
--- a/web/ts/api/admin-lecture-list.ts
+++ b/web/ts/api/admin-lecture-list.ts
@@ -17,6 +17,11 @@ export interface UpdateLectureMetaRequest {
     isChatEnabled?: boolean;
 }
 
+export interface UpdateLectureDateTimeRequest {
+    startDate: Date;
+    endTime: Date;
+}
+
 export class LectureFile {
     readonly id: number;
     readonly fileType: number;
@@ -282,6 +287,19 @@ export const AdminLectureList = {
         await post(`/api/course/${courseId}/updateLectureSeries/${lectureId}`);
     },
 
+    /**
+     * Updates date time of a lecture.
+     * @param courseId
+     * @param lectureId
+     * @param request
+     */
+    updateDateTime: async function (courseId: number, lectureId: number, request: UpdateLectureDateTimeRequest) {
+        await post(`/api/course/${courseId}/updateDateTime/${lectureId}`, {
+            startDate: request.startDate,
+            endTime: request.endTime.toLocaleTimeString([], { hour: "2-digit", minute: "2-digit" }),
+        });
+    },
+
     /**
      * Add sections to a lecture
      * @param lectureId
diff --git a/web/ts/data-store/admin-lecture-list.ts b/web/ts/data-store/admin-lecture-list.ts
index c460a0cb5..b637d57d4 100644
--- a/web/ts/data-store/admin-lecture-list.ts
+++ b/web/ts/data-store/admin-lecture-list.ts
@@ -2,7 +2,7 @@ import { StreamableMapProvider } from "./provider";
 import {
     AdminLectureList,
     Lecture,
-    LectureFile,
+    LectureFile, UpdateLectureDateTimeRequest,
     UpdateLectureMetaRequest,
     VideoSection,
     videoSectionSort,
@@ -113,6 +113,22 @@ export class AdminLectureListProvider extends StreamableMapProvider<number, Lect
         await this.triggerUpdate(courseId);
     }
 
+    async updateDateTime(courseId: number, lectureId: number, payload: UpdateLectureDateTimeRequest) {
+        await AdminLectureList.updateDateTime(courseId, lectureId, payload);
+
+        this.data[courseId] = (await this.getData(courseId)).map((s) => {
+            if (s.lectureId === lectureId) {
+                return {
+                    ...s,
+                    start: payload.startDate,
+                    end: payload.endTime,
+                };
+            }
+            return s;
+        });
+        await this.triggerUpdate(courseId);
+    }
+
     async uploadAttachmentFile(courseId: number, lectureId: number, file: File) {
         const res = await AdminLectureList.uploadAttachmentFile(courseId, lectureId, file);
         const newFile = new LectureFile({
diff --git a/web/ts/edit-course.ts b/web/ts/edit-course.ts
index 55bbf0e54..98cb20f4f 100644
--- a/web/ts/edit-course.ts
+++ b/web/ts/edit-course.ts
@@ -413,7 +413,7 @@ export function lectureEditor(lecture: Lecture): AlpineComponent {
          * Save changes send them to backend and commit change set.
          */
         async saveEdit() {
-            const { courseId, lectureId, name, description, lectureHallId, isChatEnabled, videoSections } =
+            const { courseId, lectureId, name, description, lectureHallId, isChatEnabled, videoSections, start, end } =
                 this.lectureData;
             const changedKeys = this.changeSet.changedKeys();
 
@@ -433,7 +433,7 @@ export function lectureEditor(lecture: Lecture): AlpineComponent {
 
                 // Save new date and time
                 if (changedKeys.includes("start") || changedKeys.includes("end")) {
-
+                    await DataStore.adminLectureList.updateDateTime(courseId, lectureId, { startDate: new Date(start), endTime: new Date(end) });
                 }
 
                 // Saving VideoSections