📆 Fix deep dive day (the 25th, not 18th)

src/speaking/index.html

@@ -69,7 +69,9 @@ <h4 id="online-talks">Online talks</h4>
 
       <p>Just like in 2023, most talks will be in-person, and we will have several online-exclusive talks that air during breaks in the in-person session. These will air across all three talk days (Monday through Wednesday). Please indicate your preference for online or in-person in your submissions. There’s a required question in pretalx asking your preference.</p>
 
-      <h3 id="deep-dive-talks-september-18th">Deep Dive Talks (September 18th)</h3>
+      <h3 id="deep-dive-talks-september-25th">
+        Deep Dive Talks (September 25th)
+      </h3>
 
       <p>This year, we will be curating a deep dive day to focus on exploring Django and Django-adjacent topics in detail.
       Deep dive day is meant to follow in the footsteps of <a href="https://djangounderthehood.com/">Django Under the Hood</a> and will provide a range of topics presented in-depth, targeting varying levels of Django experience.