How to compare UTCDATETIME with DATE only in reports Filter

How to compare UTCDATETIME with DATE only in reports Filter

public class ReportRun extends ObjectRun
{
    DialogField             DialogFromDate;
    DialogField             DialogToDate;
    DialogField             DialogPaymId;
    UtcDateTime               FromDate;
    UtcDateTime               ToDate;
    Name                    PaymId;

}

public boolean getFromDailog()
{
        ;
        fromDate    = clrSystemDateTime2UtcDateTime(dialogFromDate.value());
        todate      = clrSystemDateTime2UtcDateTime(dialogTodate.value() + 1);
        PaymId      = DialogPaymId.value();
        return true;
}