Fixing Time Zones for Fun turns the headache of time zone and encoding bugs into a series of brain-teasing puzzles. Martijn’s i18n-puzzles.com ran 20 daily challenges during a March 2025 online event, from hunting hidden treasure with a UTF-8 validator to thwarting right-to-left text scams and juggling multiple time-zone databases. Over 300 coders worldwide joined in, racing to crack problems that quickly ramp up from “easy warm-ups” to “best-in-class” internationalization hurdles.
Now it’s time to peek under the hood. In his talk, Martijn will showcase the top solutions and compare how different languages—think Java, JavaScript and friends—tackle tricky Time Zone and Unicode issues. Expect real code snippets, pro tips on parsing RTL text, running parallel tzdb installs and more insights to level up your i18n game.
Watch on YouTube
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