Indeed you have to go back to 1987 and the inaugural tournament in New Zealand for the last time Wales made the final four.
But after disposing of Ireland 22-10 in the quarter-finals Jenkins is confident that his troops are ready to make the World Cup final for the first time in their history.
"This is certainly the biggest game I have been involved in, and certainly for the players and the same for Welsh rugby history," he said.
"We have had some fantastic seasons in the past, and we have let ourselves down as well. We would like to keep some consistency, and I think what we have done over the last four years is why we are here.
"The way they (the young players) are playing they do not have a lot of fear at this moment in time. If France turn up and play their A game, they are one of the best sides in the world.
"We expect France to be at their best, and that is what we are preparing for. They are a fantastic side who have beaten us the last three times we played them. We are under no illusions of what is ahead of us."
Wales have a few injury concerns ahead of Saturday's clash with fly-half Rhys Priestland suffering with a shoulder problem and Luke Charteris and Jamie Roberts both concerns as well.
But Jenkins is confident that head coach Warren Gatland will have a full contingent to pick from by the time the big game comes around.
"On Rhys, we are waiting to see what happens the next couple of days and hopefully he will be fine," he added.
"I think everyone is taking this in their stride. We have a fantastic chance on Saturday, as does France. We have a lot to play for and this is a great opportunity."