Using this expression,
GroupDate: Format(DateAdd("d",IIf(([begindatetime]-Int([begindatetime]))<0.25,-1,0),[begindatetime]),"Long Date")
trying to sort using a report. The "GroupDate" field is use as the grouping field in the report in "ASC" order.

This works find from the query, but not my report.
Please advise.