diff --git a/utils/classSchedule.js b/utils/classSchedule.js
index bd03eca..07f1720 100644
--- a/utils/classSchedule.js
+++ b/utils/classSchedule.js
@@ -24,7 +24,7 @@ const formatCourseTime = (startTime, endTime) => {
   const end = formatClockPart(endTime);
   if (!start) return '';
   if (!end) return start;
-  return `از ${start} تا ${end}`;
+  return `از ساعت ${start} تا ${end}`;
 };
 
 const weekdayIndex = (value) => {
diff --git a/utils/classSchedule.test.js b/utils/classSchedule.test.js
index 98efe8d..b069e9e 100644
--- a/utils/classSchedule.test.js
+++ b/utils/classSchedule.test.js
@@ -14,8 +14,8 @@ const {
 
 describe('class schedule SMS helpers', () => {
   it('formats course time as an hour range', () => {
-    assert.equal(formatCourseTime('19:00', '21:00'), 'از 19 تا 21');
-    assert.equal(formatCourseTime('19:30', '21:00'), 'از 19:30 تا 21');
+    assert.equal(formatCourseTime('19:00', '21:00'), 'از ساعت 19 تا 21');
+    assert.equal(formatCourseTime('19:30', '21:00'), 'از ساعت 19:30 تا 21');
   });
 
   it('joins class weekdays in Persian week order', () => {
@@ -47,7 +47,7 @@ describe('class schedule SMS helpers', () => {
 
     assert.ok(context.classStartDate);
     assert.equal(context.classDays, 'شنبه و دوشنبه');
-    assert.equal(context.courseTime, 'از 19 تا 21');
+    assert.equal(context.courseTime, 'از ساعت 19 تا 21');
   });
 
   it('uses the current session for course time when provided', () => {
@@ -57,7 +57,7 @@ describe('class schedule SMS helpers', () => {
       { startTime: '10:00', endTime: '12:00' }
     );
 
-    assert.equal(context.courseTime, 'از 10 تا 12');
+    assert.equal(context.courseTime, 'از ساعت 10 تا 12');
   });
 
   it('prefers stored class days and times over inferred sessions', () => {
@@ -75,7 +75,7 @@ describe('class schedule SMS helpers', () => {
     );
 
     assert.equal(context.classDays, 'شنبه و دوشنبه');
-    assert.equal(context.courseTime, 'از 18 تا 20');
+    assert.equal(context.courseTime, 'از ساعت 18 تا 20');
   });
 });