• Here is a SQL way to do this easily:

    declare @Date date = '20140201';

    select cast(YEAR(dateadd(month,9,@Date))-1 as varchar(4)) + '-' + cast(YEAR(dateadd(month,9,@Date)) as varchar(4))

    set @Date = '20140612';

    select cast(YEAR(dateadd(month,9,@Date))-1 as varchar(4)) + '-' + cast(YEAR(dateadd(month,9,@Date)) as varchar(4))