Linked by David Adams on Thu 1st Mar 2012 22:53 UTC, submitted by judgen
Microsoft The outage on Microsoft's Windows Azure cloud computing platform that caused the government's G-Cloud service to go offline was the result of a calculation error caused by the extra day in February due to the leap year. Writing on the Azure blog the firm's corporate vice president for service and cloud, Bill Laing, said while the firm had still to fully determine the cause of the issue, the extra date in the month appeared the most likely cause.
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Everyone assumed that "Y2K" trouble was only about the year 2000, but most computers actually had different date boundaries.

The year 2000 was only a problem for those who stored dates in ascii/ebsdic form. Mainframes seem to be unusual in their use of BCD and nine's complement within their vsam files, which is why they were especially susceptible to the two digit overflow.

Binary time representations such as those in *nix have different limits, but they're also approaching.

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