Make Django model's DateTime fields timezone aware by calling this function in models class. Django doesn't automatically make those fields timezone aware, especially the auto_now and auto_now_add ones. This method will make ALL DateTime fields in the model timezone aware

datetime_field_timezone_aware.py

from django.conf import settings
from django.utils import timezone

import pytz


class ModelMixin:
    def make_datetime_fields_value_timezone_aware(self):
        # HACK: Monkey patching to fix TypeError for existing data in DB
        # TypeError: can't compare offset-naive and offset-aware datetimes
        utc_tz = pytz.timezone(settings.TIME_ZONE)

        for field in self._meta.get_fields():
            if field.get_internal_type() == "DateTimeField":
                field_name = field.name
                field_value = getattr(self, field_name, None)
                if field_value and not timezone.is_aware(field_value):
                    setattr(self, field_name, timezone.make_aware(field_value, utc_tz))


# And use it in model class like below.

class MyModel(ModelMixin, models.Model):
    # model fields ...

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.make_datetime_fields_value_timezone_aware()