Okay here is my code that is causing the error. It seems to be just the line where I attempt to add the all day event. I thought it was a date formatting issue but the line I commented out below it was created to test that and it resulted in the same error. So I am stumped. What needs to change to correct the error, or what does the error actually mean.
function cal1() {
var sheet = SpreadsheetApp.getActiveSheet();
var startRow = 2; // First row of data to process
var numRows = 300; // Number of rows to process
var dataRange = sheet.getRange(startRow, 1, numRows, 26); //What data will be used
var data = dataRange.getValues();
var cal = CalendarApp.getCalendarsByName("Production Schedule"); //Gets the correct calendar
for (i in data) {
var row = data[i];
var title = row[4]; // Column with Title
var desc = row[3]; // Column with Description
var date = row[8]; //Column with Date
var loc = row[5]; //Column with Location
cal.createAllDayEvent(title, date, {description:desc,location:loc});
//cal.createEvent("Test", new Date("3/10/2010 14:30:00"), new Date("3/10/2010 14:30:00"));
}
}