Confirmation
In Protestant denominations, it means the solemn admission of young people to the church commune (its Catholic counterpart is confirmation).
Confirmation and baptism during early Christianity, in which only adults participated, had a similar meaning. When babies began to be baptized, people joined the confirmation, whose age allowed them to receive the Eucharist.
The day of confirmation can be celebrated with grape wine, because it is from them that the blessed wine is made, symbolizing the blood of Christ during the Eucharist.