diff --git a/CHANGELOG.md b/CHANGELOG.md
index 28068179..8a04b767 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,7 @@
         <li>Fix: The "Important Information" section in the options page now updates correctly when choosing an integration [<a href="https://github.com/micz/ThunderAI/issues/730">#730</a>].</li>
         <li>In the options page now is visible if a special prompt is using a specific API integration [<a href="https://github.com/micz/ThunderAI/issues/676">#676</a>].</li>
         <li>Added an antispam skip list to ensure messages from designated addresses are not forwarded to the AI [<a href="https://github.com/micz/ThunderAI/issues/743">#743</a>].</li>
+        <li>Fix: Correctly setting the end date for a new calendar event [<a href="https://github.com/micz/ThunderAI/issues/750">#750</a>].</li>
         <li>...</li>
       </ul>
 <h2>Version 4.0.3 - 20/03/2026</h2>
diff --git a/options/mzta-release-notes.html b/options/mzta-release-notes.html
index 1a5f314f..96f231e5 100644
--- a/options/mzta-release-notes.html
+++ b/options/mzta-release-notes.html
@@ -17,6 +17,7 @@
         <li>Fix: The "Important Information" section in the options page now updates correctly when choosing an integration [<a href="https://github.com/micz/ThunderAI/issues/730">#730</a>].</li>
         <li>In the options page now is visible if a special prompt is using a specific API integration [<a href="https://github.com/micz/ThunderAI/issues/676">#676</a>].</li>
         <li>Added an antispam skip list to ensure messages from designated addresses are not forwarded to the AI [<a href="https://github.com/micz/ThunderAI/issues/743">#743</a>].</li>
+        <li>Fix: Correctly setting the end date for a new calendar event [<a href="https://github.com/micz/ThunderAI/issues/750">#750</a>].</li>
         <li>...</li>
       </ul>
       <h2>Version 4.0.3 - 20/03/2026</h2>