In "Upcoming Office Hours", use the occurrence date, not the start date.

occurrence.event.start is the start of the recurrence *series*.  We want the
current individual event, which is occurrence.start.

templates/upcoming_office_hour.html

@@ -2,7 +2,7 @@
   <div>
   {% with office_hour.event.creator as user %}
     <h3><a href="{% url view_profile user.username %}"><em>{{ user.username }}</em></a></h3>
-    <p>From {{ office_hour.event.start }} to {{ office_hour.event.end }}</p>
+    <p>From {{ office_hour.start }} to {{ office_hour.end }}</p>
     <ul class="skill"><li>{{ user.get_profile.skills.all|join:"</li><li>" }}</li></ul>
   {% endwith %}
   </div>