List all Specified Week Days Between two given Dates SQL SERVER

Declare @StartDate Datetime, @EndDate Datetime

Set @StartDate = '01/01/2009' Set @EndDate = '01/30/2009';

WITH WeekDay(FirstDay,NextDay) AS
(SELECT @StartDate AS StartDate,                      DATEADD(d,1,@StartDate) AS NextDay
UNION ALL
SELECT NextDay AS FirstDay,                                  DATEADD(D,1,NextDay) AS NextDay FROM WeekDay
WHERE NextDay BETWEEN @StartDate AND @EndDate)

SELECT FirstDay 'Sundays' FROM WeekDay WHERE  DATENAME(DW,FirstDay) = 'Sunday'