diff --git a/shadowsocks-csharp/Controller/MenuViewController.cs b/shadowsocks-csharp/Controller/MenuViewController.cs
index feaf7c18103..87854b708ea 100644
--- a/shadowsocks-csharp/Controller/MenuViewController.cs
+++ b/shadowsocks-csharp/Controller/MenuViewController.cs
@@ -542,7 +542,7 @@ private void UpdateNodeCheckerNewNodeFound(object sender, EventArgs e)
                     {
                         foreach (var serverSubscribe in config.ServerSubscribes.Where(serverSubscribe => serverSubscribe.Url == Global.UpdateNodeChecker.SubscribeTask.Url))
                         {
-                            serverSubscribe.LastUpdateTime = (ulong)DateTimeOffset.Now.ToUnixTimeSeconds();
+                            serverSubscribe.LastUpdateTime = DateTimeOffset.UtcNow.ToUnixTimeSeconds();
                         }
 
                         var defaultServer = new Server();
diff --git a/shadowsocks-csharp/Model/ServerSubscribe.cs b/shadowsocks-csharp/Model/ServerSubscribe.cs
index 38330339490..a8af9c46016 100644
--- a/shadowsocks-csharp/Model/ServerSubscribe.cs
+++ b/shadowsocks-csharp/Model/ServerSubscribe.cs
@@ -13,7 +13,7 @@ public class ServerSubscribe : ViewModelBase
     {
         private string _url;
         private string _tag;
-        private ulong _lastUpdateTime;
+        private long _lastUpdateTime;
         private bool _autoCheckUpdate;
         private HttpRequestProxyType _proxyType;
 
@@ -58,7 +58,7 @@ public string Tag
             }
         }
 
-        public ulong LastUpdateTime
+        public long LastUpdateTime
         {
             get => _lastUpdateTime;
             set
diff --git a/shadowsocks-csharp/View/SubscribeWindow.xaml b/shadowsocks-csharp/View/SubscribeWindow.xaml
index 92ccd043ba4..c902a9de1ef 100644
--- a/shadowsocks-csharp/View/SubscribeWindow.xaml
+++ b/shadowsocks-csharp/View/SubscribeWindow.xaml
@@ -1,4 +1,4 @@
-<Window x:Class="Shadowsocks.View.SubscribeWindow"
+<Window x:Class="Shadowsocks.View.SubscribeWindow"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:model="clr-namespace:Shadowsocks.Model"
@@ -36,7 +36,7 @@
                     </DockPanel>
                 </StackPanel>
             </DataTemplate>
-            <valueConverter:UlongToDateTimeString x:Key="UlongToDateTimeString" />
+            <valueConverter:UnixSecondsToString x:Key="UlongToDateTimeString" />
             <valueConverter:ProxyTypeConverter x:Key="ProxyTypeConverter" />
         </ResourceDictionary>
     </Window.Resources>
diff --git a/shadowsocks-csharp/View/ValueConverter/UlongToDateTimeString.cs b/shadowsocks-csharp/View/ValueConverter/UnixSecondsToString.cs
similarity index 58%
rename from shadowsocks-csharp/View/ValueConverter/UlongToDateTimeString.cs
rename to shadowsocks-csharp/View/ValueConverter/UnixSecondsToString.cs
index a6f7dd15735..29c1219b92c 100644
--- a/shadowsocks-csharp/View/ValueConverter/UlongToDateTimeString.cs
+++ b/shadowsocks-csharp/View/ValueConverter/UnixSecondsToString.cs
@@ -3,17 +3,15 @@
 
 namespace Shadowsocks.View.ValueConverter
 {
-    public class UlongToDateTimeString : IValueConverter
+    public class UnixSecondsToString : IValueConverter
     {
         public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
         {
-            if (value is ulong lastUpdateTime && targetType == typeof(string))
+            if (value is long lastUpdateTime && targetType == typeof(string))
             {
-                if (lastUpdateTime != 0)
+                if (lastUpdateTime is not 0)
                 {
-                    var now = new DateTime(1970, 1, 1, 0, 0, 0);
-                    now = now.AddSeconds(lastUpdateTime);
-                    return $@"{now.ToLongDateString()} {now.ToLongTimeString()}";
+                    return DateTimeOffset.FromUnixTimeSeconds(lastUpdateTime).ToLocalTime().ToString();
                 }
             }
             return @"(｀・ω・´)";