fix: Perfekt has not been removed

backend/src/algorithms/sm2/index.ts

@@ -5,9 +5,8 @@ export interface ISchedulingData {
 };
 
 function dateInNDays(n: number): number {
-    let today = new Date();
-    today.setDate(today.getDate() + n);
-    return Date.parse(today.toString());
+    //@ts-ignore
+    return new Date(Date.now() + 1000 * 60 * 60 * 24 * n);
 }
 
 export enum AnswerType {