An anniversary is a day that commemorates or celebrates a past event that occurred on the same day of the year as the initial event. For example, the first event is the initial occurrence or, if planned, the inaugural of the event. One year later would be the first anniversary of that event. The word was first used for Catholic feasts to commemorate saints.

The Latin phrase dies natalis (literally "birth day") has become a common term, adopted in many languages, especially in intellectual and institutional circles, for the anniversary of the founding ("legal or statutory birth") of an institution, such as an alma mater (college or other school). Even in ancient Rome, we know of the [dies] Aquilae natalis ("birthday of the eagle", anniversary of the official founding of a legion).

Most countries around the world celebrate national anniversaries, for example the United States Bicentennial. These could be the date of independence of the nation or the adoption of a new constitution or form of government. The important dates in a sitting monarch's reign may also be commemorated, an event often referred to as a 'Jubilee'.

Edward Regan "Eddie" Murphy (born April 3, 1961) is an American stand-up comedian, actor, writer, singer, director, and musician.

Box office takes from Murphy's films make him the second-highest grossing actor in the United States. He was a regular cast member on Saturday Night Live from 1980 to 1984 and has worked as a stand-up comedian. He was ranked #10 on Comedy Central's list of the 100 Greatest Stand-ups of All Time.

He has received Golden Globe Award nominations for his performances in 48 Hrs, Beverly Hills Cop series, Trading Places, and The Nutty Professor. In 2007, he won the Golden Globe for Best Supporting Actor and received a nomination for the Academy Award for Best Supporting Actor for his portrayal of soul singer James "Thunder" Early in Dreamgirls.

Eddie Murphy's work as a voice actor includes Thurgood Stubbs in The PJs, Donkey in the Shrek series and the dragon Mushu in Disney's Mulan. In some of his films, he plays multiple roles in addition to his main character, intended as a tribute to one of his idols Peter Sellers, who played multiple roles in Dr. Strangelove and elsewhere. Murphy has played multiple roles in Coming to America, Wes Craven's Vampire In Brooklyn, the Nutty Professor films (where he played the title role in two incarnations, plus his father, brother, mother, and grandmother), Bowfinger, Norbit, and Meet Dave.

Stephen Glenn "Steve" Martin (born August 14, 1945) is an American actor, comedian, author, playwright, producer, musician and composer. Martin came to public notice as a writer for the Smothers Brothers Comedy Hour, and later became a frequent guest on The Tonight Show. In the 1970s, Martin performed his offbeat, absurdist comedy routines before packed houses on national tours. In 2004, Comedy Central ranked Martin at sixth place in a list of the 100 greatest stand-up comics.

Since the 1980s, having branched away from stand-up comedy, Martin has become a successful actor in both comedic and dramatic roles, as well as an author, playwright, pianist, and banjo player, eventually earning Emmy, Grammy, and American Comedy awards, among other honors.

Cornelius Crane "Chevy" Chase (/ˈtʃɛvi/; born October 8, 1943) is an American comedian, writer, and television and film actor. Born into a prominent New York family, Chase worked a plethora of odd jobs before moving into comedy acting with National Lampoon. He quickly became a key cast member in the inaugural season of Saturday Night Live, where his Weekend Update skit soon became a staple of the show. Chase is also well known for his portrayal of the character Clark Griswold in four National Lampoon's Vacation films, and for his roles in other successful comedies such as Caddyshack (1980), Fletch (1985), and ¡Three Amigos! (1986). He has hosted the Academy Awards twice (1987 and 1988) and briefly had his own late-night talk show, The Chevy Chase Show. Since 2009, he has appeared as Pierce Hawthorne on the NBC comedy series Community.

Chase was born in Lower Manhattan, New York City. His father, Edward Tinsley "Ned" Chase, was a prominent Manhattan book editor and magazine writer. His mother, Cathalene Parker (née Browning), a concert pianist and librettist, was the daughter of Miles Browning, who served a critical role at the Battle of Midway in World War II; she was adopted as a child by her stepfather, Cornelius Vanderbilt Crane, heir to Crane Plumbing, and took the name Cathalene Crane. As a child, Chase vacationed at Castle Hill, the Cranes' summer estate in Ipswich, Massachusetts.^{[citation needed]}

James Thomas "Jimmy" Fallon, Jr. (born September 19, 1974) is an American actor, comedian, singer, musician and television host. He currently hosts Late Night with Jimmy Fallon, a late-night talk show that airs Monday through Friday on NBC. Prior to that he appeared in several films, and was best known as a cast member on Saturday Night Live from 1998–2004.

James Thomas Fallon, Jr., was born in Brooklyn, New York. Jimmy is the son of Gloria and James Fallon, Sr., who is a Vietnam War veteran. His family later settled in Saugerties, New York, while his father worked at IBM in nearby Kingston, New York. He is of Irish descent. As a child, he and his older sister, Gloria, would reenact the “clean parts” of Saturday Night Live that his parents had taped for him. Fallon was such a fan of Saturday Night Live that he made a weekly event of watching it in his dormitory during college. In his teens, he impressed his parents with different impersonations, the first being of James Cagney. He was also musically inclined, and started playing guitar at age 13. He would go on to mix comedy and music in contests and shows.