class measuring_datetime(models.Model):
    dt_value = models.DateTimeField(null=False, unique=True)
    def __unicode__(self):
       return str(self.dt_value)
    class Meta:
        ordering = ["dt_value"]
    class Admin:
        pass

dt_value = measuring_datetime.objects.latest('dt_value')
...
return render_to_response('show_weather.html', {'datetime_measure': dt_value
                                                    , 'id': id_last
                                                    , 'measuring_value': measuring_value_last
                                                    , 'sensor': sensor_list
                                                    })

{{ datetime_measure.hour }}

{{ datetime_measure|date:"m Y" }}

print dt_value 
2008-04-14 23:59:57

dt_value = measuring_datetime.objects.latest('dt_value').dt_value

class measuring_datetime(models.Model):
    dt_value = models.DateTimeField(null=False, unique=True)
    def __unicode__(self):
       return str(self.dt_value)

def last_measured_value(request):
    datetime_val = measuring_value.objects.order_by('-id')[0].dt_value
    print datetime_val
    return render_to_response('last_measured_value.html', \
                    {'datetime_val': datetime_val})

<p> Время{{ datetime_val|date:"D d M Y"}} </p>

TemplateSyntaxError at .....
Caught an exception while rendering: 'dict' object has no attribute 'autoescape'
Original Traceback (most recent call last):
  File "C:\Python25\lib\site-packages\django-1.1.1-py2.5.egg\django\template\debug.py", line 71, in render_node
    result = node.render(context)
  File "C:\Python25\lib\site-packages\django-1.1.1-py2.5.egg\django\template\debug.py", line 94, in render
    if (context.autoescape and not isinstance(output, SafeData)) or isinstance(output, EscapeData):
AttributeError: 'dict' object has no attribute 'autoescape'