>-60 on my computer.
>
I was passing the 2 rightmost bytes rather than 4. I got that straightened out.

FYI, the dates that you get back aren't what you think they'll be. The year will be 0. The day represents not the day of the month but rather the number of the day of the week within the month (ie if the dow is 0, it's Sunday, and if the day is 1, it's the first Sunday, if the day is 5, it would be the last Sunday.) So some conversion is necessary.