django models.py convert DateTimeField to DateField

# Add a method to your model class 
# call it like any other field in your template
class Yourclass(models.Model):
    date_field = models.DateTimeField()
    def date_trunc_field(self):
        return self.date_field.date()

Here is what the above code is Doing:
1. Create a new method in your model class
2. Call it like any other field in your template
3. The method returns the date portion of the datetime field