@GregHastings
Hi Greg,
If that's something like this

formula for Start date
=INDEX($A$1:$L$1,0,
MATCH(1,INDEX(
ISNUMBER(INDEX($A$2:$L$5,MATCH($B7,$A$2:$A$5,0),0))*
(INDEX($A$2:$L$5,MATCH($B7,$A$2:$A$5,0),0)>0),
0),
0))
for End date
=LOOKUP(2,1/(INDEX($A$2:$L$5,MATCH($B7,$A$2:$A$5,0),0)>0),$A$1:$L$1)