MaxIFs help

I have several SumIFS commands that work great... However for some columns I need to get the Maximum value for a specific range...

for example on my attached works sheet in cell D18 on my Calcs tab I have the following (=Calcs!D18)

I have

=SUMIFS('RA Data'!D:D,'RA Data'!$B:$B,">=1/8/2016 12:00:00 AM",'RA Data'!$B:$B, "<=1/8/2016 11:00:59 PM")

It works greats - it give the total of the D column on my RA Data Tab when the date range (B column) is between a date range.

What I need is to find the max or highest value of the D column when it's between the same range...

I have tried =Max(IF and SumProduct - but so far no luck... Help