Well, when it's being used as an adjective, it would ordinarily come before the noun anyway, wouldn't it? Perhaps the point is to test one's knowledge of the fact that it sometimes follows the noun, for poetic effect? (And why is that, anyway? Times like this I wish I was a teacher, perhaps I might know. You can say "bread enough" but not "bread stale." Is it because it indicates amount?)
.,,, I think conversing with you must be delightful if you take such care to be elegant as to choose to say "time enough" whenever the opportunity arises. Please do not be sad. And re the Bard, are you maybe thinking of
Marvell?
[native speaker & writer, not a teacher]