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Editorial Team
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Asked: 2026-05-27T22:27:37+00:00

With a Leap Second on the horizon for June this year it got me

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With a Leap Second on the horizon for June this year it got me wondering whether the .Net framework is leap second aware? The extra second is to be inserted after the last second of June 30th so UTC will officially be:

2012 June 30,     23h 59m 59s
2012 June 30,     23h 59m 60s
2012 July  1,      0h  0m  0s

Is the .Net framework capable of handling this? Does it even matter if Windows is not Leap Second aware? Will this affect apps in mono running on O/S’s that are Leap Second aware?

EDIT:

To expand on this a little bit i’m envisioning a scenario where a Java based solution on Linux (which is Leap Second aware) calls a .Net Web Service passing in something that is a valid timestamp in Java but is out of bounds for .Net. Are there any frameworks that cater for it (Like Noda Time perhaps)?

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1 Answer

  1. Editorial Team

    No –

    A single tick represents one hundred nanoseconds or one ten-millionth of a second. There are 10,000 ticks in a millisecond.

    The value of this property represents the number of 100-nanosecond intervals that have elapsed since 12:00:00 midnight, January 1, 0001, which represents DateTime.MinValue. It does not include the number of ticks that are attributable to leap seconds.

    Source: http://msdn.microsoft.com/en-us/library/system.datetime.ticks.aspx

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