title: Django manipulate / modify date in template
body: <p>Is it possible to make an input that changes the date.today for the whole template ?</p>
  <p>my template</p>
  <pre><code>{% for Ansicht in Ansicht.lehrertabelle_set.all  %} 
    &lt;tbody&gt;
      &lt;tr&gt;
      &lt;th scope=&quot;row&quot;&gt;&lt;/th&gt;
      &lt;td&gt;{{Ansicht.Pflichtstunden_normal}}&lt;/td&gt;
      &lt;td&gt;{{Ansicht.Status_normal}}&lt;/td&gt;
      {% if Ansicht.Prognose_FK %} 
      &lt;td&gt;{{Ansicht.Prognose_FK.Status}}&lt;/td&gt;
      &lt;td&gt;{{Ansicht.Prognose_FK.Stunden}}&lt;/td&gt;
      {% else %}
      &lt;td&gt;{{Ansicht.Prognose_FK.Status_2}}&lt;/td&gt;
      &lt;td&gt;{{Ansicht.Prognose_FK.Stunden_2}}&lt;/td&gt;
      {% endif %}
  {% endfor %}
  
  </code></pre>
  <p>the filter then would show
  those</p>
  <pre><code>    &lt;td&gt;{{Ansicht.Prognose_FK.Status_2}}&lt;/td&gt;
      &lt;td&gt;{{Ansicht.Prognose_FK.Stunden_2}}&lt;/td&gt;
  </code></pre>
  <p>instead of the first ones when the date is modified, I tried to use javascript but I guess it dont work bc of python objects</p>
  <p>my model is</p>
  <pre><code>class PrognoseTabelle(models.Model):
      Benutzer = models.ForeignKey(User, on_delete=models.SET_NULL, null=True) 
      Lehrer_FK = models.ForeignKey('LehrerTabelle', on_delete=models.SET_NULL, related_name='LehrerNName', null=True, blank=True)
      #######Status 1######
      von_Datum = models.DateField(null=True, blank=True)
      Status = models.CharField(max_length=20, null=True, blank=True)
      Stunden = models.CharField(max_length=20, null=True, blank=True)
      bis_Datum = models.DateField(null=True, blank=True)
      #######Status 2######
      von_Datum_2 = models.DateField(null=True, blank=True)
      Status_2 = models.CharField(max_length=20, null=True, blank=True)
      Stunden_2 = models.CharField(max_length=20, null=True, blank=True)
      bis_Datum_2 = models.DateField(null=True, blank=True)
      #######Status 3######
  </code></pre>