Datepart error in pivot table?

Msg 102, Level 15, State 1, Line 2
Incorrect syntax near 'DATEPART'.

ALTER Procedure [dbo].[Pivot_Attendance2]
--@StartDate Date,
--@Enddate   Date

As  
Begin 

SELECT DISTINCT ReportingDate INTO #Dates
FROM EmployeesAttendance
--WHERE     (ReportingDate BETWEEN @StartDate AND @Enddate)
ORDER BY ReportingDate

DECLARE @cols NVARCHAR(4000)
SELECT  @cols = COALESCE(@cols + ',[' + CONVERT(varchar, DATEPART(DAY, ReportingDate), 112)
				+ ']','[' + CONVERT(varchar,DATEPART(DAY, ReportingDate), 112) + ']')
FROM    #Dates
ORDER BY ReportingDate


DECLARE  @qry NVARCHAR(4000) =
N'SELECT * 
FROM (SELECT     EmpID, ReportingDate, CASE WHEN [Days] IS null AND EXISTS
                          (SELECT     1
                            FROM          EmpApplication
                            WHERE      EmployeesAttendance.Empid = EmpApplication.Empid AND 
                            (ReportingDate >= LeavFrom AND ReportingDate <= LeavTo))
                             THEN ' CL '
                             WHEN [Days] IS null AND
                       EXISTS
                          (SELECT     1
                            FROM          Holidays
                            WHERE      ReportingDate = HolidayDate) 
                            THEN 'H' 
                            WHEN [Days] IS null THEN 'A' WHEN [Days] = 1 THEN 'P' END AS Status
         DATEPART(DAY, ReportingDate)as DDate FROM EmployeesAttendance


PIVOT (MAX(Status) FOR DDate IN (' + @cols + ')) AS stat 
'
-- Executing the query

EXEC(@qry)
 
END