diff --git a/src/components/BacklogView.tsx b/src/components/BacklogView.tsx
index 64975ca..9178f6c 100644
--- a/src/components/BacklogView.tsx
+++ b/src/components/BacklogView.tsx
@@ -22,7 +22,7 @@ import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card"
 import { Badge } from "@/components/ui/badge"
 import { Button } from "@/components/ui/button"
 import { Plus, GripVertical, ChevronDown, ChevronRight, Calendar } from "lucide-react"
-import { format } from "date-fns"
+import { format, isValid, parseISO } from "date-fns"
 
 const priorityColors: Record<string, string> = {
   low: "bg-slate-600",
@@ -294,10 +294,12 @@ export function BacklogView() {
               currentSprint
                 ? {
                     name: currentSprint.name,
-                    date: `${format(new Date(currentSprint.startDate), "MMM d")} - ${format(
-                      new Date(currentSprint.endDate),
-                      "MMM d"
-                    )}`,
+                    date: `${(() => {
+                      const start = parseISO(currentSprint.startDate)
+                      const end = parseISO(currentSprint.endDate)
+                      if (!isValid(start) || !isValid(end)) return "Invalid dates"
+                      return `${format(start, "MMM d")} - ${format(end, "MMM d")}`
+                    })()}`, 
                     status: currentSprint.status,
                   }
                 : undefined
@@ -320,10 +322,12 @@ export function BacklogView() {
                   onTaskClick={(task) => selectTask(task.id)}
                   sprintInfo={{
                     name: sprint.name,
-                    date: `${format(new Date(sprint.startDate), "MMM d")} - ${format(
-                      new Date(sprint.endDate),
-                      "MMM d"
-                    )}`,
+                    date: (() => {
+                      const start = parseISO(sprint.startDate)
+                      const end = parseISO(sprint.endDate)
+                      if (!isValid(start) || !isValid(end)) return "Invalid dates"
+                      return `${format(start, "MMM d")} - ${format(end, "MMM d")}`
+                    })(),
                     status: sprint.status,
                   }}
                 />