 How often do Bachus vines mature and what is the significance of that timeline?
"The Bogans have launched no less than four military campaigns in the last two decades. The wine crop is just about ready. "Only mature every twelve years. Lots of skiing, bob-sledding, ice skating; and it's the season for woodworkers. Fruit, grain, that kind of thing; getting it in doesn't take long. But this year...." Course, I'm only twenty-eight; I can't remember but two other harvests. There's prizes for the biggest day's output, bets on who can fill the most baskets in an hour.... Matter of fact, pretty near half our young-uns are born after a vintage. "You say most of the children are born after a vintage.
 Every 12 years a vintage is held, which also serves as a cultural festival that encourage young people to procreate.
 Every 18 years a vintage is held, which is a kind of celebration of art.  Every 12 years a vintage is held, which also serves as a cultural festival that encourage young people to procreate.  Every 18 years a vintage is held, which serves as a kind of celebration of life for both young and old people.  Every 12 years a vintage is held, wherein the young people are made to harvest all the grapes.