This presentation discusses common issues developers face when working with datetimes in web applications from Python. It covers importing datetime and pytz to work with naive and aware datetimes, best practices for storing datetimes in databases like Postgres, converting datetimes between timezones, writing tests that mock datetime, and using libraries like dateutil and freezegun. The target audience is beginner Python and web developers who want to learn how to properly handle datetimes in their projects to avoid common pitfalls.