alt.hn

7/6/2026 at 4:41:26 PM

Ask HN: Are systems ready for the first negative leap second?

by Asmod4n

7/6/2026 at 5:01:55 PM

Systems are absolutely not ready. Leap seconds are a bad idea and negative leap seconds are worse. Just don't do it and let the drift cancel out.

by wmf

7/6/2026 at 4:54:18 PM

NTP.

By any other standard, most manually set clocks are up to a full minute off all the time.

by d00d0ff000

7/6/2026 at 7:42:46 PM

Yeah, but we're thinking of systems where nanoseconds matter.

MiFID 2 alone forces sub-μs precision. Million times less than the leap 1 second.

NTP minute away is good for displaying date on the workstation, not for many of the devices that are critical to the modern world.

by subscribed

7/6/2026 at 7:43:55 PM

dont most systems that rely on sharp timing simply manage it themselves.

by cyanydeez

7/6/2026 at 8:02:34 PM

Yesno.

Sure they have their own time servers fed from the GPS, but they need to be _accurate_ in relation to the world.

But timestamps used by companies forced to use very accurate timing must be synchronised to UTC.

by subscribed

7/6/2026 at 6:34:55 PM

[flagged]

by rezvovmobile