Since using character data tends to slow things down, maybe this:
SELECT DATEADD(DAY, b.Fiscal_Year_End_Day_Nbr - 1,
DATEADD(MONTH, b.Fiscal_Year_End_Month_Nbr - 1,
DATEADD(YEAR, b.Fiscal_Year_End_Year_Nbr - 1900, 0)))
FROM (
SELECT 2015 AS Fiscal_Year_End_Year_Nbr, 11 AS Fiscal_Year_End_Month_Nbr, 23 AS Fiscal_Year_End_Day_Nbr UNION ALL
SELECT 2015, 12, 16
) AS b
SQL DBA,SQL Server MVP(07, 08, 09) "It's a dog-eat-dog world, and I'm wearing Milk-Bone underwear." "Norm", on "Cheers". Also from "Cheers", from "Carla": "You need to know 3 things about Tortelli men: Tortelli men draw women like flies; Tortelli men treat women like flies; Tortelli men's brains are in their flies".