It is an essential information to the customer, it indicates the time of the aging of wines of champagne on laths.
That means, the time between the bottling (to make the prise de mousse champenoise) and the beverage.
It is an indication that we can find mentioned (sometime) on the back-label. Otherwise, It could be asked to the winegrower, do not hesitate !
The champagnes are usually sold at minimum 3 months after the date of disgorgment.
By Louise Brison, we waiting a minimum of 5 years after the date of bottling before to disgorge the vintage and over 20 years to the range of champagne Legend (vintage to 1995 to 2005).