我应该更改时间维度中的属性还是创建新维度？

i have a cube which i would like to extract data from. The cube includes a Date-dimension with a hierarchy (year-quarter-month-day), but the months are only represented as integers. I would like to "change" thoose to real month-names. Can i do that in the existing cube or do i have to create new a new time dimension?i have a cube which i would like to extract dat