diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
index e115fa61..c50cb667 100644
--- a/.github/copilot-instructions.md
+++ b/.github/copilot-instructions.md
@@ -171,5 +171,11 @@ Testing checklist:
 - After making a small edit and deploying, confirm the timestamp updates to the new edit time.
 - If using automated deploys, ensure the deploy process preserves or updates the canonical timestamp source (e.g., touch file, update metadata) so the displayed value is accurate.
 
+Maintainer update requirement:
+- The canonical human-friendly timestamp is stored in `modules/billing/timestamp.txt` and MUST be updated whenever site files or content are edited and deployed.
+- Format and wording: use a single-line plain-text entry such as: "Last Updated at 7:25am on 2025-15-11". This exact text (including capitalization) is what appears in theme footers.
+- Update process: include the `timestamp.txt` change in the same commit/PR as any content change that should alter the "Last Updated" time, or ensure your deployment process updates the file automatically (for example, a post-deploy hook that writes the current deploy time in the agreed format).
+- Rationale: themes are non-PHP files and may not support SSI on all servers; keeping a single canonical plain-text file reduces duplication and avoids server-side includes.
+
 
 **End of Copilot Instructions (No-Code).**
diff --git a/modules/billing/includes/footer.php b/modules/billing/includes/footer.php
index b174055a..e6456ebe 100644
--- a/modules/billing/includes/footer.php
+++ b/modules/billing/includes/footer.php
@@ -4,6 +4,15 @@
 <footer class="gsw-footer">
   <div class="container-wide">
     <a href="privacy.php">Privacy</a> | <a href="tos.php">TOS</a> | <a href="server_status.php">Server Status</a> | <a href="https://worlddomination.dev" target="_blank" rel="noopener">Worlddomination.dev</a>
+    <div class="last-updated" style="float:right;color:#999;font-size:0.9em;">
+      <?php
+      // Include the canonical billing timestamp text file (plain text).
+      $billing_ts = __DIR__ . '/../timestamp.txt';
+      if (file_exists($billing_ts)) {
+          echo trim(file_get_contents($billing_ts));
+      }
+      ?>
+    </div>
   </div>
 </footer>
 
diff --git a/modules/billing/timestamp.txt b/modules/billing/timestamp.txt
new file mode 100644
index 00000000..7abbabc3
--- /dev/null
+++ b/modules/billing/timestamp.txt
@@ -0,0 +1 @@
+Last Updated at 7:25am on 2025-15-11
diff --git a/themes/AdminLTE-2/bottom.html b/themes/AdminLTE-2/bottom.html
index e3c13425..f9d7381a 100644
--- a/themes/AdminLTE-2/bottom.html
+++ b/themes/AdminLTE-2/bottom.html
@@ -3,4 +3,7 @@
 
 <footer class="main-footer">
 	%footer%
-</footer>
\ No newline at end of file
+</footer>
+<div class="last-updated-ssi" style="text-align:right; font-size:0.9em; color:#777; padding:6px 8px;">
+	Last Updated at 7:25am on 2025-15-11
+</div>
\ No newline at end of file
diff --git a/themes/AdminLTE/bottom.html b/themes/AdminLTE/bottom.html
index e3c13425..f9d7381a 100644
--- a/themes/AdminLTE/bottom.html
+++ b/themes/AdminLTE/bottom.html
@@ -3,4 +3,7 @@
 
 <footer class="main-footer">
 	%footer%
-</footer>
\ No newline at end of file
+</footer>
+<div class="last-updated-ssi" style="text-align:right; font-size:0.9em; color:#777; padding:6px 8px;">
+	Last Updated at 7:25am on 2025-15-11
+</div>
\ No newline at end of file
diff --git a/themes/MasterControlProgram/bottom.html b/themes/MasterControlProgram/bottom.html
index 378f855b..94b0216b 100644
--- a/themes/MasterControlProgram/bottom.html
+++ b/themes/MasterControlProgram/bottom.html
@@ -1,5 +1,8 @@
 	<div class="col col-lg-12 footer">
 		<div class="copy">Theme made by <a href="https://techbeeps.co.in/" target="_blank">Yaseen</a>-<a href="https://www.zpeonline.co.uk" target="_blank">ZPE-Online Ltd</a> (Based on <a href="https://github.com/OpenGamePanel/Theme-SimpleBootstrap" target="_blank">SimpleBootstrap Theme</a>)</div>
 		%footer%
+	<div class="last-updated-ssi" style="text-align:right; font-size:0.9em; color:#777; padding:6px 8px;">
+	    Last Updated at 7:25am on 2025-15-11
+	</div>
 	</div>
 </div>
diff --git a/themes/Revolution-Light/bottom.html b/themes/Revolution-Light/bottom.html
index 85ea5865..373b1c62 100644
--- a/themes/Revolution-Light/bottom.html
+++ b/themes/Revolution-Light/bottom.html
@@ -57,7 +57,10 @@
       </div>  
       <div id="bottom-links"> 
         <div style="padding-top:20px"> 
-		  %footer%
+  	  %footer%
         </div> 
       </div> 
-    </div> 
\ No newline at end of file
+    </div>
+  <div class="last-updated-ssi" style="text-align:right; font-size:0.9em; color:#777; padding:6px 8px; clear:both;">
+    Last Updated at 7:25am on 2025-15-11
+  </div>
\ No newline at end of file
diff --git a/themes/Revolution/bottom.html b/themes/Revolution/bottom.html
index 5ccac6a9..5c888c28 100644
--- a/themes/Revolution/bottom.html
+++ b/themes/Revolution/bottom.html
@@ -2,11 +2,9 @@
       <div id="footer"> 
         <div class="footer-one-third"> 
         </div>
-		<div 
-class="footer-one-third 
-footer-last">  <p> 
-</p> </div>
- </div>
+        <div class="footer-one-third footer-last">  <p> 
+        </p> </div>
+     </div>
       <div id="bottom-links"> 
         <div style="padding-top:20px; width:50%; float:left;"> 
 
@@ -21,3 +19,7 @@ footer-last">  <p>
 </div> 
 </div>
 
+  <div class="last-updated-ssi" style="text-align:right; font-size:0.9em; color:#777; padding:6px 8px; clear:both;">
+    Last Updated at 7:25am on 2025-15-11
+  </div>
+
diff --git a/themes/Revolution/last_updated.php b/themes/Revolution/last_updated.php
new file mode 100644
index 00000000..b30d6c9a
--- /dev/null
+++ b/themes/Revolution/last_updated.php
@@ -0,0 +1,7 @@
+<?php
+// DEPRECATED: per-theme PHP timestamp removed in favor of /modules/billing/timestamp.txt
+// This file is retained as a no-op for compatibility. Please use the SSI include in theme bottom.html files.
+// Example SSI to add to a non-PHP footer: <!--#include virtual="/modules/billing/timestamp.txt" -->
+//
+// No runtime output produced by this file.
+
diff --git a/themes/SimpleBootstrap/bottom.html b/themes/SimpleBootstrap/bottom.html
index 8e211874..d30d082d 100644
--- a/themes/SimpleBootstrap/bottom.html
+++ b/themes/SimpleBootstrap/bottom.html
@@ -8,3 +8,6 @@ Join our Discord server for support and any questions</br>
 		
 	</div>
 </div>
+<div class="last-updated-ssi" style="text-align:right; font-size:0.9em; color:#777; padding:6px 8px;">
+	Last Updated at 7:25am on 2025-15-11
+</div>