From Wikipedia
Easter (Latin: Pascha; Greek Πάσχα Paskha, from Hebrew: פֶּסַח‎ Pesaḥ[1]) is a Christian festival and holiday celebrating the resurrection of Jesus Christ on the third day after his crucifixion at Calvary as described in the New Testament.[2][3] Easter is the culmination of the Passion of Christ, preceded by Lent, a forty-day period of fasting, prayer, and penance. The last week of Lent is called Holy Week, and it contains the days of the Easter Triduum, including Maundy Thursday (also known as Holy Thursday), commemorating the Last Supper and its preceding foot washing,[4][5] as well as Good Friday, commemorating the crucifixion and death of Jesus.[6] Easter is followed by a fifty-day period called Eastertide, or the Easter Season, ending with Pentecost Sunday.