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Editorial Team
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Asked: 2026-06-16T02:06:46+00:00

I get current UTC time to be used internally from a Windows service application

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I get current UTC time to be used internally from a Windows service application using GetSystemTime API. But I’m curious, is the time returned by that API Daylight-saving independent?

PS. Let me explain what I mean. Say, I call GetSystemTime and it returns 01:59:00 AM on the day when the Daylight-saving should take effect at 2 AM. I then call this API again in 2 minutes later (after the Daylight-saving change.) Will the second result be 2 minutes apart from the 1st result, or will Daylight-saving change be reflected in it?

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1 Answer

  1. Editorial Team

    There is no such thing as daylight savings time in UTC.

    However, there are occasional leap seconds. The last leap second was added on June 30, 2012 at at 23:59:60 UTC. Time at the end of that day went from 23:59:59 to 23:59:60 before going to 00:00:00 July 31, 2012.

    Use something such as Atomic Time if you want a leap-second free time standard.

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