diff --git a/framework/src/Volo.Abp.Timing/Volo/Abp/Timing/TZConvertTimezoneProvider.cs b/framework/src/Volo.Abp.Timing/Volo/Abp/Timing/TZConvertTimezoneProvider.cs
index 70d19090e2..e2ec99a6b0 100644
--- a/framework/src/Volo.Abp.Timing/Volo/Abp/Timing/TZConvertTimezoneProvider.cs
+++ b/framework/src/Volo.Abp.Timing/Volo/Abp/Timing/TZConvertTimezoneProvider.cs
@@ -15,7 +15,7 @@ public class TZConvertTimezoneProvider : ITimezoneProvider, ITransientDependency
 
     public virtual List<NameValue> GetIanaTimezones()
     {
-        return TZConvert.KnownIanaTimeZoneNames.OrderBy(x => x).Select(x => new NameValue(x, x)).ToList();
+        return TZConvert.KnownIanaTimeZoneNames.OrderBy(x => x).Where(x => x.Contains("/")).Select(x => new NameValue(x, x)).ToList();
     }
 
     public virtual string WindowsToIana(string windowsTimeZoneId)