Alliant recently raised their (otherwise-terrible) CD rates just for the "12-17" month catagory, to 4.30% APY (4.35 if $75k+).
There are better rates elsewhere, but at least that catagory is somewhat decent now. The exact maturity date can be set anywhere from 12 months to one day shy of 18 months. Plus, the EWP is a decent 90 days.
$1k minimum.
(Sadly, 4.30% isn't the 5.40% Alliant offered 18 months ago...)