The Azusa Street Revival, led by William J. Seymour, occured on April 9, 1906 and lasted for nearly nine years! This revival was the catalyst for Pentecostalism in America as people who attended were saved, sanctified, and filled with the Holy Ghost.
In March of this year, there was a two week revival at Asbury Seminary among young adults. Once, the revival was publicized in the media, thousands from all over the country flocked to Asbury to be a witness of this spontaneous move of God.
Read more about it here.