diff --git a/S7.Net/Enums.cs b/S7.Net/Enums.cs
index ff33d04..f4b4778 100644
--- a/S7.Net/Enums.cs
+++ b/S7.Net/Enums.cs
@@ -181,6 +181,11 @@
         /// <summary>
         /// Counter variable type
         /// </summary>
-        Counter
+        Counter,
+
+        /// <summary>
+        /// DateTIme variable type
+        /// </summary>
+        DateTime
     }
 }
diff --git a/S7.Net/PLCHelpers.cs b/S7.Net/PLCHelpers.cs
index d4e5f18..803d349 100644
--- a/S7.Net/PLCHelpers.cs
+++ b/S7.Net/PLCHelpers.cs
@@ -2,6 +2,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using DateTime = S7.Net.Types.DateTime;
 
 namespace S7.Net
 {
@@ -146,6 +147,15 @@ namespace S7.Net
                     {
                         return Bit.ToBitArray(bytes);
                     }
+                case VarType.DateTime:
+                    if (varCount == 1)
+                    {
+                        return DateTime.FromByteArray(bytes);
+                    }
+                    else
+                    {
+                        return DateTime.ToArray(bytes);
+                    }
                 default:
                     return null;
             }
@@ -178,6 +188,8 @@ namespace S7.Net
                 case VarType.DInt:
                 case VarType.Real:
                     return varCount * 4;
+                case VarType.DateTime:
+                    return varCount * 8;
                 default:
                     return 0;
             }
diff --git a/S7.Net/Protocol/Serialization.cs b/S7.Net/Protocol/Serialization.cs
index 40cb629..613c9f4 100644
--- a/S7.Net/Protocol/Serialization.cs
+++ b/S7.Net/Protocol/Serialization.cs
@@ -41,6 +41,8 @@ namespace S7.Net.Protocol
                     return Types.Double.ToByteArray((double)value);
                 case "Single":
                     return Types.Single.ToByteArray((float)value);
+                case "DateTime":
+                    return Types.DateTime.ToByteArray((System.DateTime) value);
                 case "Byte[]":
                     return (byte[])value;
                 case "Int16[]":
@@ -60,6 +62,8 @@ namespace S7.Net.Protocol
                     // if the consumer does not pay attention to string length.
                     var stringVal = (string) value;
                     return Types.String.ToByteArray(stringVal, stringVal.Length);
+                case "DateTime[]":
+                    return Types.DateTime.ToByteArray((System.DateTime[]) value);
                 default:
                     throw new InvalidVariableTypeException();
             }