When you say "whiskey in 1809 or brandy in 1923", it generally refers to the year when the factory was built.

For the year, the most important thing is the wine. If a bottle of wine says 1982, it means that 95% of the wine grapes used in this tasting are made from grapes produced in 1982. Therefore, the year is very important for wine. The price of wine in a good harvest year will be high, and vice versa.

The whiskey and brandy are no longer aged. It is generally distinguished according to the aging time in oak barrels, such as VSOP, XO, etc.