Time Zones Will Break Your Code: A Developer's Guide to Handling Dates Correctly
Explaining UTC storage timezone conversion and the bugs that plague datetime handling
The Anatomy of a URL: What Every Part Means and Why It Matters
Breaking down protocol host port path query and fragment with security and routing implications
You Need to Understand Encoding: UTF-8 Unicode and Why Your Text Breaks
Explaining character encoding issues that cause bugs across languages databases and APIs
JSON Is Not Just a Data Format: Schema Validation and the Bugs You're Missing
Teaching JSON Schema validation and why accepting unvalidated JSON is a security and reliability risk
Understanding DNS: Why Every Developer Should Know How Domain Names Actually Work
Explaining DNS resolution caching TTLs and propagation - knowledge that prevents hours of confused debugging
You Don't Understand HTTP: The Protocol Fundamentals That Explain Half Your Bugs
Demonstrating how ignorance of status codes headers caching and connection reuse causes mysterious production issues
