~ Nacht und Tag was er mag ~
This sounds a little awkward in English because it's a literal translation done so the reader can note the cognates. This is a contemporary stein made after WWII marked "Gerz - West Germany".
Nacht und Tag was er mag
muß ein Landsknecht haben.
Night and day what he wants
a trooper (mercenary military) must have.
Translation: Roy De Selms
Photo credit: Unknown