1. The Idaho State Capitol building was completed: On November 21, 1912, the Idaho State Capitol building in Boise was completed after four years of construction. The building is now listed on the National Register of Historic Places and serves as the seat of government for the state of Idaho.

2. The first women's basketball game was played: On November 21, 1895, the first recorded women's basketball game was played in the United States at Hamline University in St. Paul, Minnesota. One of the players on the Hamline team, Clara Gregory Baer, was originally from Moscow, Idaho.

3. The first ski resort was opened: On November 21, 1936, the Sun Valley ski resort opened in Idaho. It was the first ski resort in the United States and helped to popularize the sport of skiing in the country.

4. Idaho celebrated its centennial: On November 21, 1990, Idaho celebrated the 100th anniversary of its admission to the Union as the 43rd state. The state held numerous events to commemorate the occasion, including parades, concerts, and historical reenactments.

5. An Idaho governor was born: On November 21, 1897, Idaho governor and U.S. Senator Len B. Jordan was born in Malad City, Idaho. Jordan served as governor from 1951 to 1955 and was later elected to the U.S. Senate, where he served from 1962 to 1973.