vintage in wine-making, is the process of picking grapes and creating the finished product. A vintage wine is one made from grapes that were all, or primarily, grown and harvested in a single specified year. In certain wines, it can denote quality, as in Port wine, where port houses make and declare vintage in their best year. From this tradition, a common, though incorrect, usage applies the term to any wine that is perceived to be particularly old or of a particularly high quality. In wine produced on the colder limits of wine production, vintage is often very important because some seasons will be much warmer and reduce ripper grapes and better wine for people to drink. On the other hand, a poor growing season can lead to grapes low in sugar, which lowers the quality of the resulting wine