Vintage:

vintage wines are those produced entirely (or almost entirely) with grapes harvested in the same year. Still wines usually come from a single vintage. Sparkling wines, on the contrary, tend to be blend of grapes from different years’ harvests. This ensures more consistency in the wine style from year to year. Using a single vintage, on the other hand, enhances the wine’s special features and uniqueness, that largely depend on the weather during the grapes’ growing season. Aromas, flavours and overall quality can change from one year to the next. The vintage year is displayed on the label