diff --git a/ICSSoft.FromERP/SyncCustomer_WeiMas.cs b/ICSSoft.FromERP/SyncCustomer_WeiMas.cs
index d1630c7..f0e7cb7 100644
--- a/ICSSoft.FromERP/SyncCustomer_WeiMas.cs
+++ b/ICSSoft.FromERP/SyncCustomer_WeiMas.cs
@@ -67,7 +67,7 @@ namespace ICSSoft.FromERP
 
                     var input = new CustomerInputDto();
                     input.BeginTime = lastDate.Value;
-                    input.EndTime = new DateTime(9999, 99, 99, 0, 0, 0);
+                    input.EndTime = new DateTime(9999, 1, 1, 0, 0, 0);
 
                     var inputObj = JsonConvert.SerializeObject(input);
                     string url = ICSHelper.GetConfigString()["WeiMasErpUrl"];
diff --git a/ICSSoft.FromERP/SyncItem_WeiMas.cs b/ICSSoft.FromERP/SyncItem_WeiMas.cs
index 6ef4293..d0f6557 100644
--- a/ICSSoft.FromERP/SyncItem_WeiMas.cs
+++ b/ICSSoft.FromERP/SyncItem_WeiMas.cs
@@ -65,7 +65,7 @@ namespace ICSSoft.FromERP
 
                     var input = new ItemInputDto();
                     input.BeginTime = lastDate.Value;
-                    input.EndTime = new DateTime(9999, 99, 99, 0, 0, 0);
+                    input.EndTime = new DateTime(9999, 1, 1, 0, 0, 0);
 
                     var inputObj = JsonConvert.SerializeObject(input);
                     string url = ICSHelper.GetConfigString()["WeiMasErpUrl"];
diff --git a/ICSSoft.FromERP/SyncVendor_WeiMas.cs b/ICSSoft.FromERP/SyncVendor_WeiMas.cs
index ba17202..c8fafbc 100644
--- a/ICSSoft.FromERP/SyncVendor_WeiMas.cs
+++ b/ICSSoft.FromERP/SyncVendor_WeiMas.cs
@@ -67,7 +67,7 @@ namespace ICSSoft.FromERP
 
                     var input = new VendorInputDto();
                     input.BeginTime = lastDate.Value;
-                    input.EndTime = new DateTime(9999, 99, 99, 0, 0, 0);
+                    input.EndTime = new DateTime(9999, 1, 1, 0, 0, 0);
 
                     var inputObj = JsonConvert.SerializeObject(input);
                     string url = ICSHelper.GetConfigString()["WeiMasErpUrl"];