The Time Paradox: Building Timezone-Safe Python/Django Applications

Handling time in software seems simple, until it isn’t. From daylight savings quirks to database inconsistencies and user-local conversions, timezones can quietly turn into one of your biggest sources of bugs. In this talk, we’ll unravel the paradox of time in Python and Django: how something so universal can be so tricky to get right. You’ll learn how Django handles datetime objects, the difference between naive and aware datetimes, common pitfalls when working with ORM and serializers, and best practices for ensuring your applications stay consistent across users, systems, and regions. By the end, you’ll be equipped with practical techniques and mental models to make your Django apps truly timezone-safe, and your logs, reports, and users finally in sync.