Date Convert Routines

Where can I find date conversion routine(s) in BW that will take a DATS formatted field, YYYYMMDD, and return:

1) Calendar Day

2) Quarter

3) Calendar year/quarter

4) Calendar year/Month

5) Calendar month

6) Calendar Year/Week

7) Calendar Year

8) Weekday

9) Fiscal Year/period

10) Posting period

11) Fiscal Year