hot-reload errors

nextjs/src/app/course/[courseName]/CalendarMonth.tsx

@@ -1,4 +1,3 @@
-"use client";
 import { useState } from "react";
 import { CalendarMonthModel } from "./calendarMonthUtils";
 import { DayOfWeek, LocalCourse } from "@/models/local/localCourse";

nextjs/src/app/course/[courseName]/Day.tsx

@@ -1,8 +1,6 @@
-"use client";
-
 export default function Day({ day }: { day?: Date }) {
   const classes = "border rounded rounded-3 p-2 pb-4 m-1 ";
-  if (!day) return <div className={classes + ""}></div>;
+  if (!day) return <div className={classes + ""}>d</div>;
 
   return <div className={classes + " bg-slate-900"}>{day.getDate()}</div>;
 }

nextjs/src/app/course/[courseName]/calendarMonthUtils.ts

@@ -1,4 +1,3 @@
-"use client";
 export interface CalendarMonthModel {
   year: number;
   month: number;
@@ -17,7 +16,7 @@ const weeksInMonth = (year: number, month: number): number => {
   return weeks;
 };
 
-export const createCalendarMonth = (
+const createCalendarMonth = (
   year: number,
   month: number
 ): CalendarMonthModel => {