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Improperly formatted date strings in Django with timezone-aware datetime fields

👀 Views: 13 💬 Answers: 1 📅 Created: 2025-06-13
django datetime timezone python Python

I'm maintaining legacy code that I'm upgrading from an older version and I'm collaborating on a project where Can someone help me understand I'm sure I'm missing something obvious here, but I'm relatively new to this, so bear with me. I'm working on a Django application (version 4.0) where I need to save user-submitted date strings into a timezone-aware datetime field in my model. The date strings are coming from a form input in the format 'MM/DD/YYYY'. However, when I try to create the object, I keep getting the behavior: `ValueError: time data '01/13/2023' does not match format '%Y-%m-%d %H:%M:%S.%f'`. I understand the date format is not matching the expected format for the datetime field. To handle this, I've tried using the `datetime.strptime` method to convert the input string into a datetime object before saving it, but I keep running into issues when time zones are involved. Here’s the relevant code snippet that I'm using: ```python from datetime import datetime from django.utils import timezone # Assuming 'date_string' is the input from the user date_string = '01/13/2023' try: naive_datetime = datetime.strptime(date_string, '%m/%d/%Y') aware_datetime = timezone.make_aware(naive_datetime) # Now save to model my_model_instance = MyModel(datetime_field=aware_datetime) my_model_instance.save() except ValueError as e: print(f'behavior parsing date: {e}') ``` However, the `make_aware` function doesn’t seem to be working as I expected. It's trying to attach the local timezone to the naive datetime, and I'm not sure if I need to configure something in my Django settings to handle this correctly. The `USE_TZ` setting is set to `True`, and I’ve configured the `TIME_ZONE` to `'America/New_York'`. What’s the correct way to convert this naive datetime string into a timezone-aware datetime object that Django can save without throwing exceptions? Should I be using a different method or approach here? This is part of a larger service I'm building. My development environment is Linux. Any help would be greatly appreciated! Is there a better approach? Thanks, I really appreciate it! What's the correct way to implement this? I'm working in a macOS environment. What are your experiences with this? This issue appeared after updating to Python 3.10. Hoping someone can shed some light on this.