dynamic report header and detail

I am building a report which has 7 columns. Mon thru Sun. The header and data columns are dynamic

For ex the report looks like

Mon Tue Wed Thu Fri Sat Sun

-- - -- - --

2 2 4 2 4 5 6

0 7 6 7 9 4 2

The report header and data are dynamic. The seq of columns,data is not always the same. It could be Tue thru Mon., or Fri thru Thru...etc...

Please advice how to program this dynamic nature of the report