trying to get {{ t.start_stamp }} to display as a date, its saved as a Unix EPOC timestamp

models.py

# This is an auto-generated Django model module.
# You'll have to do the following manually to clean this up:
#   * Rearrange models' order
#   * Make sure each model has one field with primary_key=True
#   * Make sure each ForeignKey has `on_delete` set to the desired behavior.
#   * Remove `managed = False` lines if you wish to allow Django to create, modify, and delete the table
# Feel free to rename the models, but don't rename db_table values or field names.
from __future__ import unicode_literals
from django.db import models
from datetime import datetime


class BtBoard(models.Model):
    serial = models.CharField(max_length=32)
    reference = models.CharField(max_length=12)
    ref_num = models.CharField(max_length=12)
    product = models.CharField(db_column='Product', max_length=32)  # Field name made lowercase.
    location = models.IntegerField()
    status = models.CharField(max_length=32)
    kit_id = models.IntegerField()
    salesorderno = models.CharField(db_column='SalesOrderNo', max_length=32)  # Field name made lowercase.
    locked = models.IntegerField()
    productionentrynumber = models.CharField(db_column='ProductionEntryNumber', max_length=32)  # Field name made lowercase.
    production_stamp = models.IntegerField()
    notes = models.CharField(max_length=255)
    
    @property
    def production_stamp_datetime(self):
        return datetime.fromtimestamp(self.production_stamp)

    class Meta:
        managed = False
        db_table = 'bt_board'


class BtTransaction(models.Model):
    start_stamp = models.IntegerField()
    userid = models.IntegerField()
    test_type = models.CharField(max_length=12)
    reference = models.CharField(max_length=32)
    ref_num = models.IntegerField()
    test_slot = models.IntegerField()
    test_sw = models.CharField(max_length=32)
    test_func = models.IntegerField()
    test_run = models.CharField(max_length=12)
    status = models.CharField(max_length=12)
    resol_id = models.IntegerField()
    rma_id = models.IntegerField()
    notes = models.CharField(max_length=256)
    board = models.ForeignKey(BtBoard, on_delete=models.CASCADE)
    
    @property
    def start_stamp_datetime(self):
        return datetime.fromtimestamp(self.start_stamp)

    class Meta:
        managed = False
        db_table = 'bt_transaction'


class Location(models.Model):
    name = models.TextField()

    class Meta:
        managed = False
        db_table = 'location'

report.html

{%  extends 'layouts/base.html' %}
{%  block title %}
- Report
{% endblock %}
{% block content %}

{% if trans_list %}
    <table class="table table-striped table-hover">
    <thead>
        <tr>
            <th>Start Stamp</th>
            <th>User ID</th>
            <th>Board ID</th>
            <th>Reference</th>
            <th>Ref Num</th>
            <th>Test</th>
        </tr>
    </thead>
    <tbody>
    {% for t in trans_list %}
        <tr>
            <td>{{ t.start_stamp|date }}</td>
            <td>{{ t.userid }}</td>
            <td>{{ t.board.id }}</td>
            <td>{{ t.reference }}</td>
            <td>{{ t.ref_num }}</td>
            <td>{{ t.test }}</td>
        </tr>
    {% endfor %}
    </tbody>
    </table>
{% else %}
    <p>No transactions!</p>
{% endif %}
{% endblock %}

views.py

from django.shortcuts import render
from django.http import HttpResponse
import time
import datetime

from .models import BtBoard, BtTransaction


def index(request):
    return render(request, 'boardtracker/index.html')


def report(request):
    startdate = time.mktime(datetime.datetime.strptime(request.POST['startdate'], "%Y-%m-%d").timetuple())
    enddate = time.mktime(datetime.datetime.strptime(request.POST['enddate'], "%Y-%m-%d").timetuple())
    refnum = request.POST['ref_num']

    if refnum == '':
        transactions = BtTransaction.objects.filter(start_stamp__gte=startdate, start_stamp__lte=enddate).order_by('-board')
    else:
        transactions = BtTransaction.objects.filter(start_stamp__gte=startdate, start_stamp__lte=enddate, ref_num=refnum).order_by('-board')
    context = {
        'trans_list': transactions,
    }
    return render(request, 'boardtracker/report.html', context)