Background: Michael Laudrup (born 15 June 1964) is a Danish former footballer and the current manager of Qatar Stars League club Al Rayyan. He is regarded as one of the greatest players of his generation by many pundits. He is the older brother of fellow retired footballer Brian Laudrup. During his playing career, Laudrup won league titles with Ajax, Barcelona, Real Madrid and Juventus, playing mainly as an attacking midfielder, although he was also capable of playing in other offensive positions.
Context: Laudrup was called up for the Denmark national team during Brondby's debut season in the top-flight. On his 18th birthday on 15 June 1982, he became the then-second-youngest Danish national team player ever, following Harald Nielsen. Despite playing for relegation battlers Lazio, Laudrup starred for the Denmark national team at UEFA Euro 1984, playing all four of Denmark's matches.  Laudrup participated in the 1986 FIFA World Cup in Mexico, a performance which is best remembered for his exceptional solo dribble and goal in the 6-1 defeat of Uruguay. He was also a part of the disappointing Denmark squad at Euro 1988, though Laudrup experienced personal success, scoring one of Denmark's two goals.  Following three matches in the qualification campaign for Euro 1992, Laudrup opted to quit the national team in November 1990 (alongside his brother Brian Laudrup and Jan Molby) following differences with coach Richard Moller Nielsen. The Danes originally failed to qualify but were later given Yugoslavia's place as Yugoslavia were kicked out due to war in their country. Notwithstanding their qualification, Laudrup rated Denmark's chances of success so low he stayed on holiday, a decision he must have regretted as Denmark beat holders the Netherlands on penalties in the semi-finals with legendary keeper Peter Schmeichel surprisingly saving a Marco van Basten penalty in the shoot-out. In the final against world champions and favourites Germany, the Danes stunned the world with a 2-0 win thanks to goals from John Jensen and Kim Vilfort, making it arguably the biggest surprise in a UEFA European Championship final.  Laudrup returned to Nielsen's Danish squad in August 1993, but saw Spain and the Republic of Ireland qualify for the 1994 World Cup ahead of Denmark. He scored a goal in the 2-0 victory against Argentina, as Denmark won the 1995 Intercontinental Cup. He also scored four goals in ten matches as Denmark qualified for Euro 1996, though the tournament would leave no positives for him.  Laudrup's last matches for Denmark came at the 1998 World Cup, when he captained the nation to the quarter-final. Laudrup made his 100th appearance for Denmark in the team's opening game of the tournament, a 1-0 defeat of Saudi Arabia in Lens. Denmark was defeated 2-3 by Brazil in the quarter-finals, and both Michael and Brian Laudrup announced their international retirement following the elimination. Both brothers ended their international careers on a high note as both Michael and Brian were named in FIFA's All-Star Team.
Question: when did he join the danish team?

Answer:
On his 18th birthday on 15 June 1982, he became the then-second-youngest Danish national team player ever,