Definition of "dayer"

I envy the Marilyn Fishers of the world who have the time — and the money — to embark on 45 cruises, the least of which a seven-dayer.

1992, Louisville Automobile Club, American Automobile Association, Home & away in Kentucky, volumes 13-14, page 40

Blossoms that flower atop willowy weedy stems such as forget-me-nots, delphiniums, and gauras should be thought of as two-dayers; they don't draw water well or retain preservatives.

1996, Rayford Clayton Reddell, Full bloom: thoughts from an opinionated gardener, page 66