Question: When was the song we are the world recorded?

Disambiguated questions and answers:
context: Following Band Aid's 1984 "Do They Know It's Christmas?" project in the UK, an idea for the creation of an American benefit single for African famine relief came from activist Harry Belafonte, who, along with fundraiser Ken Kragen, was instrumental in bringing the vision to reality. Several musicians were contacted by the pair, before Jackson and Lionel Richie were assigned the task of writing the song. The duo completed the writing of "We Are the World" seven weeks after the release of "Do They Know It's Christmas?", and one night before the song's first recording session, on January 21, 1985. The historic event brought together some of the most famous artists in the music industry at the time.
question: What was the first night of recording for the song We are the World?
short_answers: January 21, 1985
wikipage: We Are the World
context: The final night of recording was held on January 28, 1985, at A&M Recording Studios in Hollywood. Michael Jackson arrived at 8 pm, earlier than the other artists, to record his solo section and record a vocal chorus by himself. He was subsequently joined in the recording studio by the remaining USA for Africa artists, who included Ray Charles, Billy Joel, Diana Ross, Cyndi Lauper, Bruce Springsteen, and Tina Turner. Also in attendance were five of Jackson's siblings: Jackie, La Toya, Marlon, Randy, and Tito. Many of the participants came straight from an American Music Award ceremony, which had been held that same night. Invited musician Prince, who would have had a part in which he and Michael Jackson sang to each other, did not attend the recording session. The reason given for his absence has varied. One newspaper claimed that Prince did not want to record with other acts. Another report, from the time of "We Are the World"'s recording, suggested that the musician did not want to partake in the session because organizer Bob Geldof called him a "creep". Prince did, however, donate an exclusive track, "4 The Tears In Your Eyes", for the "We Are the World" album. Eddie Murphy was asked by Wonder to participate, but Murphy turned him down as he was busy recording "Party All the Time." Murphy later stated after he "realized what it was [he] felt like an idiot." In all, more than 45 of America's top musicians participated in the recording, and another 50 had to be turned away. Upon entering the recording studio, the musicians were greeted by a sign pinned to the door which read, "Please check your egos at the door." They were also greeted by Stevie Wonder, who proclaimed that if the recording was not completed in one take, he and Ray Charles, two blind men, would drive everybody home.
question: What was the final night of recording for the song We are the World?
short_answers: January 28, 1985
wikipage: We Are the World

Long-form answers:
knowledge: content: "We Are the World" is a charity single originally recorded by the supergroup USA for Africa in 1985.
wikipage: We Are the World
content: With sales in excess of 20 million copies, it is the eighth best-selling physical single of all time.
wikipage: We Are the World
content: A charity record or charity single is a song released by musicians with most or all proceeds raised going to a dedicated foundation or charity.
wikipage: Charity record
long_answer: We Are the World is a charity single record that was originally recorded by the supergroup USA for Africa in 1985 to raise proceeds for African famine relief. The single was recorded over a period of days, from January 21, 1985 to January 28, 1985. More than 45 or America's top musicians participated in the recording. The record sold over 20 million copies and is the eighth best-selling physical single of all time.