I know this is going to sound like a lame question but I
can't find any documentation on how to do this in Access
Reports.

I have a calculated value that uses the datedif function
so that I can tell how many days between two given dates
in the report. I want to group them in 30 day intervals
so that in the report it groups them by 30 and 60 and
90... For example... How do I do this!

Thanks,

Ken