how to justified when a wine was produce ? looking at the year that printed at bottle ???

Answer 1

Yes - the only guidance is the vintage year, which is the year the grapes were harvested. Immediately after harvesting the grapes will be processed. Production can take several months, and then barrel and bottle aging could take some more years.

On new world wines the back label often gives details of howlong barrel aging took and when the wine was bottled.

Answer 2

If there is a year on the bottle, that is the year of the grape harvest. The year it gets to the market can be anywhere from a few months later (nuveau wine) to many years (port, sherry). White wine is usually sold sooner after harvest than red.