A common technique in the data warehousing world is to create a dates or calendar table that list all the possible permutations of a date. ie.:

date

calendar year

fiscal year

calendar quarter

fiscal quarter

calendar month

fiscal month

day of calendar month

day of fiscal month

day of calendar year

day of fiscal year

etc. Then query the table with a where = Getdate() and it returns all permutations of a date. This approach also makes date range queries easy, instead of WHERE DATE BETWEEN 1/1/11 AND 3/31/11

you could use WHERE FiscalQuarter = 201101.