Leap seconds will be abolished from July 2025: what infrastructure teams should do

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The BIPM has announced that leap seconds will no longer be inserted into UTC starting July 1, 2025, prompting renewed attention across the IT community. Systems relying on NTP, PTP, or precise timestamps could experience a skipped or inconsistent second if they are not prepared. The article outlines which sectors are most exposed, including financial trading, cryptocurrency, GPS, and data centers, and gives examples of possible failures. It recommends auditing servers and network devices, checking firmware and time-sync configurations, and testing behavior with simulated leap-second events. Practical commands and scripts are provided to disable leap-second handling and verify synchronization status.

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