How to group in nunjucks date by different hour?

Question

JSON

I can’t figure out how to group data whose initial value is different
for the example
2017-10-16 12:07:07
2017-10-16 15:09:08
It is necessary to group according to this format on October 16 .
I added a filter to change the date, but it seems to change it after grouping and there is no sense from this.
The result is this

16 Oct
16 Oct
16 Oct
3 Nov
29 Nov
29 Nov

Output Template

<div class="container">
      <div class="row">
          <div class="col-5">
               {% for date , block in block | groupby("date") %}
                 <div class="date">{{date |date }}</div>
              {% endfor %}

          </div>
      </div>
  </div>

json example

{
        "date": "2017-10-16 15:09:08",
        "id": "564564867363231401",
        "image": "img",
        "name": "расчет",
        "name:1": "staaf1",
        "price": "102.0",
        "quantity": "72",
        "removed": "0"
    },
    {
        "date": "2017-10-16 15:09:08",
        "id": "564563124867361410",
        "image": "img",
        "name": "расчет",
        "name:1": "staff",
        "price": "121.0",
        "quantity": "41",
        "removed": "0"
    },