$birthday = str_replace('1000','1901',$birthday);
- $birthday = datetime_convert('UTC','UTC',$birthday,'Y-m-d');
+ if ($birthday != "")
+ $birthday = datetime_convert('UTC','UTC',$birthday,'Y-m-d');
// this is to prevent multiple birthday notifications in a single year
// if we already have a stored birthday and the 'm-d' part hasn't changed, preserve the entry, which will preserve the notify year