diff --git a/PdfScribe/App.config b/PdfScribe/App.config
index 36a68b3..7ba8ded 100644
--- a/PdfScribe/App.config
+++ b/PdfScribe/App.config
@@ -39,6 +39,9 @@
 				<!-- This will slow things down because another pass will be made through the postscript file - set it to "False" unless needed -->
 				<value>True</value>
 			</setting>
+			<setting name="DatetimeFormat" serializeAs="String">
+				<value>yyyy_MM_dd_HH_mm_ss</value>
+			</setting>
 		</PdfScribe.Properties.Settings>
 	</applicationSettings>
 </configuration>
diff --git a/PdfScribe/Program_2.cs b/PdfScribe/Program_2.cs
index 6636d5f..675f1bc 100644
--- a/PdfScribe/Program_2.cs
+++ b/PdfScribe/Program_2.cs
@@ -98,12 +98,28 @@ ex is NotSupportedException ||
 
         private static String GetOutputFilename()
         {
-            String outputFilename = Path.GetFullPath(Environment.ExpandEnvironmentVariables(Properties.Settings.Default.OutputFile));
+            string rawFilename = Properties.Settings.Default.OutputFile;
+
+            if (rawFilename.Contains("%DATETIME%"))
+            {
+                string format = Properties.Settings.Default.DatetimeFormat;
+                if (string.IsNullOrWhiteSpace(format))
+                {
+                    format = "yyyy_MM_dd_HH_mm_ss"; // Fallback
+                }
+
+                string datetimeString = DateTime.Now.ToString(format);
+                rawFilename = rawFilename.Replace("%DATETIME%", datetimeString);
+            }
+
+            string outputFilename = Path.GetFullPath(Environment.ExpandEnvironmentVariables(rawFilename));
+
             // Check if there are any % characters -
             // even though it's a legal Windows filename character,
             // it is a special character to Ghostscript
             if (outputFilename.Contains("%"))
                 throw new ArgumentException("OutputFile setting contains % character.");
+
             return outputFilename;
         }
 
diff --git a/PdfScribe/Properties/Settings.Designer.cs b/PdfScribe/Properties/Settings.Designer.cs
index c464d8c..c3eb144 100644
--- a/PdfScribe/Properties/Settings.Designer.cs
+++ b/PdfScribe/Properties/Settings.Designer.cs
@@ -12,7 +12,7 @@ namespace PdfScribe.Properties {
     
     
     [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "17.4.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "17.14.0.0")]
     internal sealed partial class Settings : global::System.Configuration.ApplicationSettingsBase {
         
         private static Settings defaultInstance = ((Settings)(global::System.Configuration.ApplicationSettingsBase.Synchronized(new Settings())));
@@ -58,5 +58,14 @@ public bool StripNoRedistill {
                 return ((bool)(this["StripNoRedistill"]));
             }
         }
+        
+        [global::System.Configuration.ApplicationScopedSettingAttribute()]
+        [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
+        [global::System.Configuration.DefaultSettingValueAttribute("yyyy_MM_dd_HH_mm_ss")]
+        public string DatetimeFormat {
+            get {
+                return ((string)(this["DatetimeFormat"]));
+            }
+        }
     }
 }
diff --git a/PdfScribe/Properties/Settings.settings b/PdfScribe/Properties/Settings.settings
index cb4e7c6..380b68c 100644
--- a/PdfScribe/Properties/Settings.settings
+++ b/PdfScribe/Properties/Settings.settings
@@ -14,5 +14,8 @@
     <Setting Name="StripNoRedistill" Type="System.Boolean" Scope="Application">
       <Value Profile="(Default)">True</Value>
     </Setting>
+    <Setting Name="DatetimeFormat" Type="System.String" Scope="Application">
+      <Value Profile="(Default)">yyyy_MM_dd_HH_mm_ss</Value>
+    </Setting>
   </Settings>
 </SettingsFile>
\ No newline at end of file