Django default=timezone.now + delta
default takes a callable, so you just need to write a function to do what you want and then provide that as the argument:
def one_day_hence(): return timezone.now() + timezone.timedelta(days=1)class MyModel(models.Model): ... key_expires = models.DateTimeField(default=one_day_hence)(As discussed here, resist the temptation to make this a lambda.)