diff --git a/frontend/src/components/ScheduleModal.tsx b/frontend/src/components/ScheduleModal.tsx
index f7dd54b..3d5cd4b 100644
--- a/frontend/src/components/ScheduleModal.tsx
+++ b/frontend/src/components/ScheduleModal.tsx
@@ -81,16 +81,20 @@ export const ScheduleModal = ({
     return `${hour.toString().padStart(2, '0')}:00`;
   };
 
-  const formatTime = (hour: number, minutes: number) => {
-    const totalMinutes = hour * 60 + minutes;
-    const h = Math.floor(totalMinutes / 60) % 24;
-    const m = totalMinutes % 60;
-    return `${h.toString().padStart(2, '0')}:${m.toString().padStart(2, '0')}`;
-  };
+  const formatInTZ = (date: Date) =>
+    date.toLocaleTimeString('en-US', {
+      timeZone: displayTimezone,
+      hour: '2-digit',
+      minute: '2-digit',
+      hour12: false,
+    });
+
+  const getStartTimeDisplay = () => formatInTZ(new Date(slot.start_time));
 
   const getEndTime = () => {
     if (!slot) return '';
-    return formatTime(slot.hour, duration);
+    const start = new Date(slot.start_time);
+    return formatInTZ(new Date(start.getTime() + duration * 60 * 1000));
   };
 
   const formatDate = (dateStr: string) => {
@@ -174,7 +178,7 @@ export const ScheduleModal = ({
             </div>
             <div className="flex items-center gap-3 text-sm">
               <Clock className="w-4 h-4 text-primary" />
-              <span><span className="text-primary font-medium">{formatHour(slot.hour)} – {getEndTime()}</span> <span className="text-muted-foreground">({getTimezoneAbbrev(displayTimezone)})</span></span>
+              <span><span className="text-primary font-medium">{getStartTimeDisplay()} – {getEndTime()}</span> <span className="text-muted-foreground">({getTimezoneAbbrev(displayTimezone)})</span></span>
             </div>
             <div className="flex items-center gap-3 text-sm">
               <Users className="w-4 h-4 text-primary" />