diff --git a/src/components/DaySummary.tsx b/src/components/DaySummary.tsx
index bd08e70..27f7263 100644
--- a/src/components/DaySummary.tsx
+++ b/src/components/DaySummary.tsx
@@ -10,13 +10,15 @@ interface DaySummaryProps {
   totalDuration: number;
   dayStartTime: Date;
   onPostDay: () => void;
+  onDiscardDay: () => void;
 }
 
 export const DaySummary: React.FC<DaySummaryProps> = ({
   tasks,
   totalDuration,
   dayStartTime,
-  onPostDay
+  onPostDay,
+  onDiscardDay
 }) => {
   return (
     <div className="space-y-6">
@@ -62,6 +64,13 @@ export const DaySummary: React.FC<DaySummaryProps> = ({
             >
               Post Time to Archive
             </Button>
+            <Button
+              variant="outline"
+              onClick={onDiscardDay}
+              className="w-full border-destructive text-destructive hover:bg-destructive/10 hover:text-destructive"
+            >
+              Discard Day
+            </Button>
           </div>
         </CardContent>
       </Card>
diff --git a/src/contexts/TimeTrackingContext.tsx b/src/contexts/TimeTrackingContext.tsx
index 59f121d..9c88f0a 100644
--- a/src/contexts/TimeTrackingContext.tsx
+++ b/src/contexts/TimeTrackingContext.tsx
@@ -131,6 +131,7 @@ interface TimeTrackingContextType {
   // Actions
   startDay: (startDateTime?: Date) => void;
   endDay: () => void;
+  discardDay: () => void;
   startNewTask: (
     title: string,
     description?: string,
@@ -572,6 +573,18 @@ export const TimeTrackingProvider: React.FC<{ children: React.ReactNode }> = ({
     }
   };
 
+  const discardDay = () => {
+    setIsDayStarted(false);
+    setDayStartTime(null);
+    setCurrentTask(null);
+    setTasks([]);
+    setHasUnsavedChanges(true);
+    if (dataService) {
+      dataService.saveCurrentDay({ isDayStarted: false, dayStartTime: null, currentTask: null, tasks: [] })
+        .catch(error => console.error("❌ Error saving state after discarding day:", error));
+    }
+  };
+
   const startNewTask = (
     title: string,
     description?: string,
@@ -1081,6 +1094,7 @@ export const TimeTrackingProvider: React.FC<{ children: React.ReactNode }> = ({
         categories,
         startDay,
         endDay,
+        discardDay,
         startNewTask,
         updateTask,
         deleteTask,
diff --git a/src/pages/Index.tsx b/src/pages/Index.tsx
index 2704540..eb5e669 100644
--- a/src/pages/Index.tsx
+++ b/src/pages/Index.tsx
@@ -23,6 +23,7 @@ const TimeTrackerContent = () => {
 		archivedDays,
 		startDay,
 		endDay,
+		discardDay,
 		postDay,
 		deleteTask,
 		startNewTask,
@@ -50,6 +51,10 @@ const TimeTrackerContent = () => {
 		postDay();
 	};
 
+	const handleDiscardDay = () => {
+		discardDay();
+	};
+
 	const handleNewTask = (
 		title: string,
 		description?: string,
@@ -80,6 +85,7 @@ const TimeTrackerContent = () => {
 						totalDuration={getTotalDayDuration()}
 						dayStartTime={dayStartTime}
 						onPostDay={handlePostDay}
+						onDiscardDay={handleDiscardDay}
 					/>
 				</div>
 			</PageLayout>