The publish method currently saves the current time in UTC using timezone.now(). This means that if you're working in a system where daylight saving time (DST) is applicable, your save time will be different from local time.

To avoid this discrepancy, use timezone.localtime(timezone.now()) to ensure the save time matches the user's location. Here’s how you can update your code:

def publish(self, instance, with_valid=True):
    application.is_publish = True
    application.save()

    # Use timezone localtime instead of utcnow for correct saved date and time
    work_flow_version = ApplicationVersion(
        work_flow=application.work_flow,
        application=application,
        name=datetime.strftime(application.created_at.astimezone(datetime.now().astimezone(tzinfo=None)), '%Y-%m-%d %H:%M:%S'), 
        publish_user_id=user_id,
        publish_user_name=user.username,
        workspace_id=workspace_id
    )

This change uses the created_at field on ApplicationInstance to get the timestamp which aligns better with what you might want to use when publishing something related to an instance creation date or event datetime, rather than always referring to now which could skew based on DST boundaries.