How to find a logical value to spot whether dates have the same month and year?

I have two date vectors and one vector of numbers:

% vector 1
t1 = datetime(2002,01,31):calmonths:datetime(2020,12,31);
t1= t1';

% vector 2
t2 = datetime(2002,01,23):calmonths:datetime(2020,12,23);
t2 = t2';
t2(randsample(100,28))=[];

% vector of numbers

r = randn(228,1);

What I want to do is, first, to compare t1 and t2 to see when they are equal on the basis of months and years and, then, keep only the rows of r when this happens. What I tried was:

% first solution

rr = [];
for i = 1:length(r)
if ismember(month(t1(i)) & year(t1(i)), month(t2) & year(t2)) == 1 
    rr(i) = r(i);
else
    rr(i) = NaN;
end
end

% second solution

for i = 1:length(r)  
if any(ismember(month(t1(i)), month(t2))) & any(ismember(year(t1(i)),year(t2)))
    rr(i) = r(i);
else
    rr(i) = NaN;
end
end

In either case, it desn't work. It always gives me back 1 even if there there is no match.

Can anyone help me?

Thanks!