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How I Fixed 19 Timezone Bugs in My Time-Tracking App With Claude Code

This story is from 2026-10-13. It is preserved in the archive; the latest stories are on the live feed.

TL;DR My time-tracking app had been quietly lying to users in every timezone that wasn't mine. I used Claude Code (v2.x) to build a test harness that replays the app across 40 timezones and every DST boundary, found 19 real bugs, and fixed them in about a week. The secret wasn't the fixes — it was…

Read the full story at DEV Community — AI ↗

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  1. 2026-10-13 14:31 · DEV Community — AI
    How I Fixed 19 Timezone Bugs in My Time-Tracking App With Claude Code

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