Work in Progress
$E$ and $I$
Visited on Saturday, February 10th, 2018.
$H$
Visited on a Saturday.
$D$ and $G$
Visited on a Wednesday 10 days prior to $H$.
$J$
Visited in March between the 1st and 12th (any of these days fit).
$C$
Visited in April between the 19th and 30th (any of these days fit).
$A$ and $B$
Visited 28 days after F, but before $J$.
$F$
$B$