Truncate the date properties to the day so the columns sort as they display

Rapr/Utils/DriverStoreEntry.cs

@@ -39,10 +39,18 @@ public class DriverStoreEntry
         /// </summary>
         public Guid DriverExtensionId { get; set; }
 
+        // The date columns format with {0:d} and ObjectListView sorts the raw value, so a time part
+        // makes the sort disagree with the text on screen and starves the secondary sort column.
+        private DateTime driverDate;
+
         /// <summary>
         /// Sys file date
         /// </summary>
-        public DateTime DriverDate { get; set; }
+        public DateTime DriverDate
+        {
+            get => this.driverDate;
+            set => this.driverDate = value.Date;
+        }
 
         /// <summary>
         /// Sys file version
@@ -174,10 +182,16 @@ private static string SanitizeFolderName(string name, int maxLength)
         /// </summary>
         public bool? DevicePresent { get; set; }
 
+        private DateTime? installDate;
+
         /// <summary>
         /// Driver install date - when the driver package was imported/added to the driver store
         /// </summary>
-        public DateTime? InstallDate { get; set; }
+        public DateTime? InstallDate
+        {
+            get => this.installDate;
+            set => this.installDate = value?.Date;
+        }
 
         /// <summary>
         /// List of driver files (sys, DLLs) in the driver package

RaprTests/DriverStoreEntryTests.cs

@@ -0,0 +1,62 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+using Rapr.Utils;
+
+namespace Rapr.Tests
+{
+    [TestClass]
+    public class DriverStoreEntryTests
+    {
+        [TestMethod]
+        public void InstallDateIsTruncatedToTheDayItDisplays()
+        {
+            var morning = new DriverStoreEntry { DriverInfName = "morning", InstallDate = new DateTime(2026, 10, 6, 8, 15, 1) };
+            var evening = new DriverStoreEntry { DriverInfName = "evening", InstallDate = new DateTime(2026, 10, 6, 23, 45, 59) };
+            var nextDay = new DriverStoreEntry { DriverInfName = "nextDay", InstallDate = new DateTime(2026, 10, 7, 0, 0, 0) };
+
+            Assert.AreEqual(new DateTime(2026, 10, 6), morning.InstallDate);
+            Assert.AreEqual(new DateTime(2026, 10, 6), evening.InstallDate);
+            Assert.AreEqual(new DateTime(2026, 10, 7), nextDay.InstallDate);
+
+            // ObjectListView falls through to the secondary column only when this compare returns
+            // 0, and OrderBy keeps ties in input order, so "evening" staying ahead of "morning"
+            // is the order a reader now gets instead of the raw 23:45 sorting after 08:15.
+            CollectionAssert.AreEqual(
+                new[] { "evening", "morning", "nextDay" },
+                new List<DriverStoreEntry> { evening, nextDay, morning }
+                    .OrderBy(e => e.InstallDate)
+                    .Select(e => e.DriverInfName)
+                    .ToArray());
+        }
+
+        [TestMethod]
+        public void InstallDateKeepsNull()
+        {
+            var entry = new DriverStoreEntry { InstallDate = null };
+            Assert.IsNull(entry.InstallDate);
+
+            entry.InstallDate = new DateTime(2026, 10, 6, 8, 15, 1);
+            Assert.AreEqual(new DateTime(2026, 10, 6), entry.InstallDate);
+
+            entry.InstallDate = null;
+            Assert.IsNull(entry.InstallDate);
+        }
+
+        [TestMethod]
+        public void DriverDateIsTruncatedToTheDayItDisplays()
+        {
+            var entry = new DriverStoreEntry { DriverDate = new DateTime(2026, 10, 6, 23, 45, 59) };
+            Assert.AreEqual(new DateTime(2026, 10, 6), entry.DriverDate);
+
+            entry.DriverDate = default(DateTime);
+            Assert.AreEqual(default(DateTime), entry.DriverDate);
+
+            entry.SetDriverDateAndVersion("2026-10-06 31.0.15.3623");
+            Assert.AreEqual(new DateTime(2026, 10, 6), entry.DriverDate);
+        }
+    }
+}