Fixing Time Zones for Fun

Martijn launched i18n-puzzles.com with twenty daily challenges to turn annoying time zone and encoding bugs into addictive brainteasers. From hunting down a UTF-8 treasure to untangling right-to-left text scams and juggling multiple time zone databases for science tasks, the puzzles ramp up quickly—and over 300 devs from around the globe dived in during a March 2025 online event.

Now it’s time to peek under the hood: Martijn will showcase the slickest solutions, compare how different languages (Java, JavaScript, and more) tackle internationalization, and walk you through advanced Unicode and time zone tricks with real code examples.

Watch on YouTube