diff --git a/src/data/enrolled-courses.ts b/src/data/enrolled-courses.ts
index 09a5f9a..ea935dc 100644
--- a/src/data/enrolled-courses.ts
+++ b/src/data/enrolled-courses.ts
@@ -116,21 +116,21 @@ export const useDetailedEnrolledCourses = (): Array<DetailedEnrolledCourse> => {
 		return {
 			...course,
 			name: courseInfo.name,
-			classes: course.classes.map((cl) => {
+			classes: course.classes.map((cls) => {
 				const notFound = {
-					typeId: cl.id,
+					typeId: cls.id,
 					type: 'NOT_FOUND',
 					classNumber: '66666',
 					meetings: [],
 				};
-				const classInfo = courseInfo.class_list.find((c) => c.id === cl.id);
+				const classInfo = courseInfo.class_list.find((c) => c.id === cls.id);
 				if (!classInfo) return notFound;
 				const { type, classes } = classInfo;
 				const meetings = classes.find(
-					(c) => c.number === cl.classNumber,
+					(c) => c.number === cls.classNumber,
 				)?.meetings;
 				if (!meetings) return notFound;
-				return { typeId: cl.id, type, classNumber: cl.classNumber, meetings };
+				return { typeId: cls.id, type, classNumber: cls.classNumber, meetings };
 			}),
 		};
 	});
diff --git a/src/helpers/calendar.ts b/src/helpers/calendar.ts
index 76179df..f17ea43 100644
--- a/src/helpers/calendar.ts
+++ b/src/helpers/calendar.ts
@@ -71,18 +71,18 @@ export const getWeekCourses = (
 	const courses: WeekCourses = [[], [], [], [], []];
 
 	enrolledCourses.forEach((c) => {
-		c.classes.forEach((cl) => {
-			cl.meetings.forEach((m) => {
+		c.classes.forEach((cls) => {
+			cls.meetings.forEach((m) => {
 				const isMeetingInWeek = checkDateRangeInWeek(weekStart, m.date);
 				if (!isMeetingInWeek) return;
 				const course = courses[WEEK_DAYS.indexOf(m.day)];
 				const newCourse: WeekCourse = {
 					id: c.id,
 					name: c.name,
-					classTypeId: cl.typeId,
-					classType: cl.type,
+					classTypeId: cls.typeId,
+					classType: cls.type,
 					location: m.location,
-					classNumber: cl.classNumber,
+					classNumber: cls.classNumber,
 				};
 				const existingTime = course.find(
 					(t) => t.time.start === m.time.start && t.time.end === m.time.end,
@@ -126,7 +126,7 @@ export const useCalendar = () => {
 	const enrolledCourses = useDetailedEnrolledCourses();
 
 	const dates = enrolledCourses.flatMap((c) =>
-		c.classes.flatMap((cl) => cl.meetings.flatMap((m) => m.date)),
+		c.classes.flatMap((cls) => cls.meetings.flatMap((m) => m.date)),
 	);
 	const [startWeek, endWeek] = getStartEndWeek(dates);
 
@@ -191,16 +191,16 @@ export const useOtherWeekCourseTimes = ({
 	);
 	if (!classes) return [];
 	const times: OtherWeekCoursesTimes = [[], [], [], [], []];
-	classes.forEach((cl) => {
-		cl.meetings.forEach((m) => {
-			if (cl.number === currentClassNumber) return;
+	classes.forEach((cls) => {
+		cls.meetings.forEach((m) => {
+			if (cls.number === currentClassNumber) return;
 			const isMeetingInWeek = checkDateRangeInWeek(currentWeek, m.date);
 			if (!isMeetingInWeek) return;
 			const time = times[WEEK_DAYS.indexOf(m.day)];
 			const existingTime = time.find(
 				(t) => t.time.start === m.time.start && t.time.end === m.time.end,
 			);
-			const newClass = { number: cl.number, location: m.location };
+			const newClass = { number: cls.number, location: m.location };
 			if (existingTime) {
 				existingTime.classes.push(newClass);
 				return;