This is a list of events held and scheduled by the Ultimate Fighting Championship (UFC), a mixed martial arts promotion based in the United States. UFCs first event UFC 1, took place on November 12, 1993. Each UFC event contains several fights. Traditionally, five fights take place on the televised main card, whilst others are held on the unaired preliminary portion and are also aired on the live broadcast if time permits.

Occasionally, the UFC holds a live "UFC Prelim" show, prior to their pay-per-view events, which airs at least two of the event's preliminary fights live on FX or Fuel TV. As of UFC 100, typically most UFC events have held 11 fights in total at each event, though sometimes there can be more than 11 or less, due to last-minute injuries. Prior to UFC 83, it was common to see 9 fights per event take place.

UFC events are separated into seven different formats:

Many of the "numbered" events have taken place on pay-per-view, though there have been a few exceptions for reasons such as tape-delay. Events such as UFC 72, which took place in Belfast, Northern Ireland, were sold on pay-per-view, but due to tape-delay, purchase rates were not as high as events that aired at a traditional starting time. UFC 72 had a buyrate of 200,000 viewers; a figure so low that it would not be matched as of October 2010. As such, many events taking part in significantly different timezones, such as UFC 120 in England, were given a same-night airing in American primetime on Spike TV.

Anderson da Silva (Portuguese pronunciation: [ˈɐ̃deʁsõ ˈsiwvɐ]; born April 14, 1975) is a Brazilian mixed martial artist. He is the current UFC Middleweight Champion and the promotion's longest reigning champion. With 14 consecutive wins and 9 title defenses, Silva holds the longest winning streak and title defense streak in UFC history.

Silva is ranked as the number one Middleweight in the world by multiple publications, and is the consensus No. 1 pound-for-pound fighter in the world according to ESPN, Sherdog, Yahoo! Sports, MMAFighting.com and other publications. UFC president Dana White has proclaimed Silva as "the greatest mixed martial artist ever."^{[undue weight? – discuss]} Silva is also the last Cage Rage Middleweight Champion and a former Shooto Middleweight Champion. Besides the UFC and Cage Rage, Silva has fought for a number of other MMA promotions including the Pride Fighting Championships, Shooto and Rumble on the Rock.

Although known primarily for his mastery of Muay Thai striking, Silva is also a Brazilian Jiu-Jitsu blackbelt, a rank he earned in 2006 from Antônio Rodrigo Nogueira who follows Gracie Lineage through Carlson Gracie, like Murilo Bustamante and the Brazilian Top Team. He began martial arts training at the age of 14, training Tae kwon do and earning a black belt by the age of 18. He is also a black belt in Judo and a yellow rope in Capoeira.

Chael Patrick Sonnen (pronounced /ˈtʃeɪl ˈsʌnən/; born April 3, 1977) is an American mixed martial artist who competes as a middleweight in the Ultimate Fighting Championship. He was an NCAA Division I All-American wrestler at the University of Oregon, a silver medalist at the 2000 Greco-Roman World University Championships, as well as a two-time Dave Schultz Memorial International Greco-Roman winner.

As of October 2011^[update], Sonnen is ranked as the No. 2 middleweight in the world by Sherdog.

Sonnen was born Chael Patrick Sonnen on April 3, 1977 in West Linn, Oregon.

Sonnen started his MMA career at the age of 19 in 1997 by defeating Ben Hailey in Vancouver, Washington. His second fight was against future ICON Sport Middleweight Champion and Strikeforce Middleweight contender Jason "Mayhem" Miller. Sonnen went 6–0 in his first six fights, until his loss to Trevor Prangley, which he later avenged in 2006 at UFC Ultimate Fight Night 4. He also fought The Ultimate Fighter winner and former UFC Light Heavyweight Champion Forrest Griffin.

William Penn (October 14, 1644 – July 30, 1718) was an English real estate entrepreneur, philosopher, and founder of the Province of Pennsylvania, the English North American colony and the future Commonwealth of Pennsylvania. He was an early champion of democracy and religious freedom, notable for his good relations and successful treaties with the Lenape Indians. Under his direction, the city of Philadelphia was planned and developed.

In 1681, King Charles II handed over a large piece of his American land holdings to William Penn to satisfy a debt the king owed to Penn's father. This land included present-day Pennsylvania and Delaware. Penn immediately sailed to America and his first step on American soil took place in New Castle in 1682. On this occasion, the colonists pledged allegiance to Penn as their new Proprietor, and the first general assembly was held in the colony. Afterwards, Penn journeyed up river and founded Philadelphia. However, Penn's Quaker government was not viewed favorably by the Dutch, Swedish, and English settlers in what is now Delaware. They had no "historical" allegiance to Pennsylvania, so they almost immediately began petitioning for their own Assembly. In 1704 they achieved their goal when the three southernmost counties of Pennsylvania were permitted to split off and become the new semi-autonomous colony of Lower Delaware. As the most prominent, prosperous and influential "city" in the new colony, New Castle became the capital.