Index & Match & Date quandry

[Greenies08]

Hi there

I have some data that I want to pull out the 'max' and by 'who' within a defined month.
I've managed the max formula ok but struggling to build the month part into my index/match array.
Any help would be truly appreciated.

03/01/2019	A Smith	1400	5005	Shrub
05/02/2019	C David	1400	5005	Shrub
08/01/2019	F Carol	1000	5000	Tree
14/01/2019	G Williams	1400	5000	Tree
18/01/2019	B Smith	750	5000	Tree

<colgroup><col width="75" style="width: 56pt; mso-width-source: userset; mso-width-alt: 2742;"><colgroup><col width="189" style="width: 142pt; mso-width-source: userset; mso-width-alt: 6912;"><colgroup><col width="64" style="width: 48pt;" span="2"><colgroup><col width="153" style="width: 115pt; mso-width-source: userset; mso-width-alt: 5595;"><tbody>
</tbody>

01/01/2019		Arrays
Max Shrub	1400	MAX(IF((MONTH($A$1:$A$5)=MONTH($A$7))*($D$1:$D$5=5005),$C$1:$C$5))
Who	A Smith	IF(B$8=0,"",INDEX($B$1:$B$5,MATCH(1,(5000=$D$1:$D$5)*(B$8=$C$1:$C$5),0)))
Max Tree	1400	MAX(IF((MONTH($A$1:$A$5)=MONTH($A$7))*($D$1:$D$5=5000),$C$1:$C$5))
Who	G Williams	IF(B$10=0,"",INDEX($B$1:$B$5,MATCH(1,(5000=$D$1:$D$5)*(B$10=$C$1:$C$5),0)))

<colgroup><col width="75" style="width: 56pt; mso-width-source: userset; mso-width-alt: 2742;"><colgroup><col width="189" style="width: 142pt; mso-width-source: userset; mso-width-alt: 6912;"><colgroup><col width="635" style="width: 476pt; mso-width-source: userset; mso-width-alt: 23222;"><tbody>
</tbody>

01/02/2019
Max Shrub	1400
Who	A Smith	Should be C David?

<colgroup><col width="75" style="width: 56pt; mso-width-source: userset; mso-width-alt: 2742;"><colgroup><col width="189" style="width: 142pt; mso-width-source: userset; mso-width-alt: 6912;"><colgroup><col width="635" style="width: 476pt; mso-width-source: userset; mso-width-alt: 23222;"><tbody>
</tbody>

 

[Fluff]

Try
=IF(B$8=0,"",INDEX($B$1:$B$5,MATCH(1,(5005=$D$1:$D$5)*(B$8=$C$1:$C$5)*(MONTH($A$13)=MONTH($A$1:$A$5)),0)))