How Well Do You Know 1970s of U.S. History?Share:FacebookPinterestTwitterMailWhich U.S. holiday, celebrated on April 22, was first established in 1970?80%Next Correct Incorrect Earth Day was created in 1970 to raise awareness about environmental protection. Which U.S. holiday, celebrated on April 22, was first established in 1970? Flag Day Earth Day Veterans Day Arbor Day 80%
