Grouping by Date (Day) Not Working Correctly
Figured it out. I actually asked for all entries for the group, rather than just the entries (events) that matched the date. 

{% set passEvents = craft.entries.section("event").eventForwardPass("Yes").status('live','pending').order('eventStartDate').find() %}
{% for date, events in passEvents|group('eventStartDate') %}

    &lt;h3&gt;{{date}}&lt;/h3&gt;

    {% for entry in events %}
        &lt;article class="none"&gt;
            &lt;section class=txt&gt;
               {% if entry.eventLinkOverride == 1 %}
                  &lt;h1&gt;&lt;a href="{{ entry.eventLink }}"&gt;{{ entry.title }}&lt;/a&gt;&lt;/h1&gt;
                {% else %}
                   &lt;h1&gt;&lt;a href="{{ entry.url }}"&gt;{{ entry.title }}&lt;/a&gt;&lt;/h1&gt;
                {% endif %}

            &lt;/section&gt;
        &lt;/article&gt;
        {% endfor %}
    {% endfor %}