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Daylight saving creator left the chat.... (lemmy.world)
submitted 8 months ago by devilish666@lemmy.world to c/programmer_humor@programming.dev
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[-] uis@lemm.ee 1 points 8 months ago* (last edited 8 months ago)

not unless somehow the system clock was modified while it was running..

Which is how most systems handle leap seconds.

[-] arc@lemm.ee 1 points 8 months ago* (last edited 8 months ago)

Leap seconds still make time go forwards, not backwards. NTP clients would also resolve small time discrepancies while still advancing forwards prior to the next time sync.

[-] uis@lemm.ee 1 points 8 months ago* (last edited 8 months ago)

Leap seconds can make time go both ways, but adding them makes time stop/go back because 24:00:00 cannot be represented as 1/86400 part of day N instead of day N+1 on major OSes. And they were only added so far.

[-] arc@lemm.ee 1 points 8 months ago* (last edited 8 months ago)

It doesn't work like that. UTC goes forward always. Leap seconds are scheduled and known in advance. NTP time services will just smear time advancement a little to account for an additional second. Time never has to go backwards. This is how Google does it.

[-] uis@lemm.ee 1 points 8 months ago

This is how Google does it in their datacenters, but not major OSes by default

this post was submitted on 03 Apr 2024
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