not answering your question but i've seen an option in CR for the date format. but forgot where it is.

maybe it is depend on the Regional Setting of your computer.
but in CR you can try to check from:
- right click your date field in the report
- choose 'Format Field...'
- click 'Customize...'
make sure 'Date' tab is selected
check on Date Type.
is there a Julian date format?
if 'not' then.. need help from someone else. sorry can't help you further.
regards,