Today is Easter, also called Pascha or Resurrection Sunday, the Christian festival that celebrates Christ's resurrection. (In Orthodox Christianity, Easter is April 12). It is the climax of Holy Week and concludes the season of Lent, and is the beginning of the seven-week Easter Season leading up to Pentecost Sunday. The date is figured by the first Sunday after the first full moon after the spring equinox, which means that the holiday can happen as early as March 21 and as late as April 25. "Easter" actually comes from the name of an Anglo-Saxon and Germanic goddess of the springtime, while "Pascha" derives from the Hebrew "Pesach," the name of the Passover season, from which Easter derives several theological aspects as well as calendar proximity.