vbdate() returning wrong date

[kyrnel]

I wrote a simple PHP script to display upcoming events on the ForumHome page but when I try to format the date, it always shows Dec 31, 1969.

$up_eventdate = vbdate("M-d",$event[eventdate]);

$event[eventdate] returns the appropriate value in the format 'Y-m-d'.
I just want to change that to 'M-d' format.

Is this not working because the array is returning a string value for the date?
I thought vbdate() would convert a string to a date if it was a valid date format.

Anyone have any ideas here?