a more complete description of how you want your report to work would help.
You might be able to replace the body layout part with a sub summary layout part "sorted by" your date field would give you one row of data for every date. But this will only work if the rest of your requirements for this report are compatible with that design.
Here's a tutorial on summary reports that use sub summary layout parts: Creating Filemaker Pro summary reports--Tutorial
The end result I am looking for would be:
Category (printed on first occurrence only)
Date (first occurrence only printed)
Entity Activity (these two always print)
Description (this always prints)
(fields are bolded)
Does this help clarify what I am looking for?
It would seem to perfectly fit what I am describing as a summary report.