Oklahoma Day is held on April 22. 1889. This event in the third decade of the month april is annual.
A&M Day on April 21 (Texas A&M University);
Chemists Celebrate Earth Day in USA on April 22 (In 2003, the American Chemical Society joined in on April 22's festivities. Each year, ACS highlights one of four general topics and chooses a theme—this year it's "Our Earth: Handle With Care"—to focus the celebration and highlight how chemists can contribute to a greener world);
St. Thomas Carnival in US Virgin Islands on April 22 (St. Thomas proudly presents one of the largest Carnival celebrations in the entire Caribbean. The post-Easter, month-long event is ripe with activities including parades, food fairs and a large Carnival village where the music and dancing never stops);