I save dates to the database in the following format - "1979-12-28"

When displaying them on the website I want to display it as "28 Dec 1979" so I tried this:

echo "Born:" . date("d M Y",$myrow["DOB"]) . "<br>";

but that converts "1979-12-28" to "Born:31 Dec 1969"

What am I doing wrong?