Both men's and women's events have been held since the 1992 Winter Games in Albertville.
TAG!! from bob
Mens hockey became an olympic sport in 1920
Freestyle skiing (aerials, ballet, moguls) debuted as a demonstration sport at the 1988 Games in Calgary. At the 1992 Games, moguls was a medal event and aerials and ballet were still demonstration events. Ballet was dropped from the 1994 Games and aerials became a medal event.
Tennis returned as a medal sport at the Olympics in 1988, 68 years after it had last been featured as such. The previous Olympics in 1984, and also in 1968, featured it as a demonstration sport only.
1998 Nagano Winter Games