[Python] Can't compare naive and aware datetime.now() <= challenge.datetime_end

I am trying to compare the current date and time with dates and times specified in models using comparison operators:

if challenge.datetime_start <= datetime.now() <= challenge.datetime_end:


The script errors out with:

TypeError: can't compare offset-naive and offset-aware datetimes


The models look like this:

class Fundraising_Challenge(models.Model):
name = models.CharField(max_length=100)
datetime_start = models.DateTimeField()
datetime_end = models.DateTimeField()


I also have django using locale date and times.

What I haven't been able to find is the format django uses for DateTimeField(). Is it naive or aware? And how do I get datetime.now() to recognize locale datetime?

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