Calendar function not working

    Hi, I've been trying to figure out why the calendar function below isn't working for me in qlik sense. I used that code earlier with a different data set and it worked.

     

    LOAD
        "Date",
        "# of calls",
        "Average Length of Call (minutes)",
        "# of abandoned calls",
        "Average Speed of Answer (seconds)"

    FROM [lib://AttachedFiles/Call Data - July 2014 to Dec 2015.xlsx]
    (ooxml, embedded labels, table is Sheet1);


    Calendar:
    DECLARE FIELD DEFINITION TAGGED '$Date'
       Parameters
          first_month_of_year = 1
       Fields
          Year($1) As Year Tagged '$year',
          Month($1) as Month Tagged '$month',
          Date($1) as Date Tagged ('$date', '$day'),
          Week($1) as Week Tagged '$week',
          Weekday($1) as Weekday Tagged '$weekday',

    DERIVE FIELDS FROM FIELDS Date USING Calendar;