Declare @YMD Varchar(10)='2015-04-01'
;
With T
As
(
	Select Dateadd(day,number,@YMD) As D 
		From Master.dbo.spt_values Where Type='P'
			And number Between 0 And 31  
)
Select 
Isnull([1],'') As Sun,
Isnull([2],'') As Mon,
Isnull([3],'') As Tue,
Isnull([4],'') As Wed,
Isnull([5],'') As Thu,
Isnull([6],'') As Fri,
Isnull([7],'') As Sat
From
(
	Select Convert(Varchar(2),day(D)) As Y,DATEPART(WEEKDAY,D) As X,
		DATEPART(WEEK,D) As Z 
			From T 
				Where Month(D)=Month(@YMD)
) S
Pivot
(
 Max(Y) 
 For
 X in([1],[2],[3],[4],[5],[6],[7])
)P