4-4-5 to 5-4-4 ?

Hello,

currently using date pattern 4-4-5 and wanted to change to 5-4-4..

I am new to JDE Financial and have question on this change ... i can see there will be some impact on changing Date Patter from Fiscal or Calendar to 4-4-5 .....

my question is,

     (1)  Is there any impact on changing 4-4-5 to 5-4-4? 

     (2)  how do i see how 4-4-5 or 5-4-4 date pattern used in Financial reports?

Thanks!