Happy New Year for Zune Owners

Here's an exercise for you. What happens when days = 366 in the code below? Maybe the better question is what happens when programmers skip their morning coffee when they reinvent the wheel and write a "simple" date parser with leap year detection? This code was loaded on every 30 GB Zune. Check out the offending module and read the coverage on Engadget. This presents a great case for unit testing!

---

 
while (days > 365)
{
    if (IsLeapYear(year))
    {
        if (days > 366)
        {
            days -= 366;
            year += 1;
        }
        //else?? 
    }
    else
    {
        days -= 365;
        year += 1;
    }
}

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What's in your firmware??