How long does an open galliano liqueur last?

Answer 1

Unopened, the liquor should last for several years. However, once it is opened, it should last about a year, just as long as you are sure to store it in a cool and dark place, like a pantry or liquor cabinet. Even unopened, I would still recommend keeping it away from too much light and heat.

Answer 2

Three years or so as long as it's kept cool and out of the sun.