[Fixed]-Django – Grouping querysets by a certain field in template

You’re looking for the {% regroup %} tag, which does exactly what you want. It takes a sequence of items (it has to be ordered beforehand, which yours is) and a lookup and groups the sequence by that lookup.

view:

events = Event.objects.select_related.all()

template:

{% regroup events by date as events_by_date %}
{% for date in events_by_date %}
    <div class="content">
    <h1>{{ date.grouper|date:"d F Y" }}</h1>
    {% for event in date.list %}
        {% include "partials/event.html" %}
    {% endfor %}
    </div>
{% endfor %}

(Notice that the date format string is different; the equivalent of %B in strftime is F for the date filter).