DECLARE @MyDate DATETIME SET @MyDate = getDate()
DECLARE @StartDate DATETIME DECLARE @EndDate DATETIME
SET @StartDate = DATEADD(dd,0, DATEDIFF(dd,0, DATEADD( mm, -(((12 + DATEPART(m, @MyDate)) - 4)%12), @MyDate ) - datePart(d,DATEADD( mm, -(((12 + DATEPART(m, @MyDate)) - 4)%12),@MyDate ))+1 ) ) SET @EndDate = DATEADD(ss,-1,DATEADD(mm,12,@StartDate ))
SELECT @StartDate,@EndDate