diff --git a/frontend/frontend/src/components/DeadlineCalendar.tsx b/frontend/frontend/src/components/DeadlineCalendar.tsx
index 9835c497..4bb31940 100644
--- a/frontend/frontend/src/components/DeadlineCalendar.tsx
+++ b/frontend/frontend/src/components/DeadlineCalendar.tsx
@@ -65,9 +65,15 @@ function ServerDay(
             key={props.day.toString()}
             overlap="circular"
             badgeContent={
-                isSelected ? (
-                    <AssignmentIcon color={'primary'} fontSize={'small'} />
-                ) : undefined
+                isSelected
+                    ? props.day.isBefore(dayjs())
+                        ?   (
+                                <AssignmentIcon color={'secondary'} fontSize={'small'} />
+                            )
+                        :   (
+                                <AssignmentIcon color={'primary'} fontSize={'small'} />
+                            )
+                    : undefined
             }
         >
             <PickersDay