diff --git a/Models/Slide.cs b/Models/Slide.cs
index 71444a3..06998dd 100644
--- a/Models/Slide.cs
+++ b/Models/Slide.cs
@@ -47,5 +47,8 @@ public class Slide
     public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
     public DateTime UpdatedAt { get; set; } = DateTime.UtcNow;
 
+    /// <summary>Optional expiry (server local time) — once this passes, the slide is skipped in playback (but not deleted).</summary>
+    public DateTime? ExpiresAt { get; set; }
+
     public ICollection<DeviceSlide> DeviceSlides { get; set; } = new List<DeviceSlide>();
 }