diff --git a/journal/views/mark.py b/journal/views/mark.py
index a09e749e..129146f4 100644
--- a/journal/views/mark.py
+++ b/journal/views/mark.py
@@ -79,10 +79,12 @@ def mark(request: AuthedHttpRequest, item_uuid):
                 shelf_time_offset = {
                     ShelfType.WISHLIST: " 20:00:00",
                     ShelfType.PROGRESS: " 21:00:00",
+                    ShelfType.DROPPED: " 21:30:00",
                     ShelfType.COMPLETE: " 22:00:00",
                 }
                 dt = parse_datetime(
-                    request.POST.get("mark_date", "") + shelf_time_offset[status]
+                    request.POST.get("mark_date", "")
+                    + shelf_time_offset.get(status, "")
                 )
                 mark_date = (
                     dt.replace(tzinfo=timezone.get_current_timezone()) if dt else None