MDX TTM Calculated member - day level - mdx

Question

I need to create a calculated member that calculates revenue for TTM (Trailing Twelve Months) associated to selected date (day level).
I tried something like this:
SUM(
{
[Accounting Effective Date].[Date Hierarchy].CurrentMember.Lag(365)
: [Accounting Effective Date].[Date Hierarchy].CurrentMember
},
[Measures].[Revenue]
)
But this doesn't work with leap year, for example if I pick 2013-01-01 than it returns 2012-01-02.
I have also tried this but this one is also not good since it takes first day of the month:
SUM(
{
[Accounting Effective Date].[Date Hierarchy].CurrentMember.Parent.Lag(12).FirstChild
: [Accounting Effective Date].[Date Hierarchy].CurrentMember
},
[Measures].[Revenue]
)
Date hierarhy is following:
Year > Quarter > Month > Date

Answer 1

the following query can help, it uses cousin function to return last years date.
with member [Measures].[TestValue] as
(cousin([Date].[Calendar].currentmember,[Date].[Calendar].currentmember.parent.parent.lag(1)),[Measures].[Internet Sales Amount])
member [Measures].[TestDate] as
cousin([Date].[Calendar].currentmember,[Date].[Calendar].currentmember.parent.parent.lag(1)).item(0).name
select
{[Measures].[Internet Sales Amount],[Measures].[TestValue],[Measures].[TestDate]}
on columns,
{
[Date].[Calendar].[Date].&[20130922]
}
on rows from
[adventure works]