Your Global App's Hidden Enemy: The DST Gap

Timezone and DST gaps silently break global scheduling features without obvious error messages, making this a critical concern for developers building worldwide applications. During DST transitions—like the current US-Europe gap—timezone offsets shift unexpectedly, causing hardcoded conversions and naive datetime handling to fail in production. Understanding UTC storage, epoch calculations, and local display conversion is essential to prevent invisible failures that impact millions of users.