Holy Week
As we now practice it, Holy Week is the last week of the 40 day season of Lent and the week preceding Easter. In Holy Week we focus on the last week of Christ’s life, remembering especially His passion and resurrection. Though calling this week "Holy Week" is more of a recent innovation, the annual observance of the festivals within it are of ancient origin.
Palm/Passion Sunday
Palm Sunday is the commemoration of our Lord’s triumphant entry into Jerusalem five days before His crucifixion. This day takes it’s name from the fact that as Jesus approached Jerusalem on a donkey , the huge crowd that followed carried palm branches as they praised Him. The people hailed Him as the long awaited "Son of David," that is, the Messiah.
Maundy Thursday
Good Friday
Good Friday, also called Holy Friday or Great Friday, is the Friday before Easter (Easter always falls on a Sunday). It commemorates the crucifixion and death of Jesus at Calvary.
Black Saturday
(Also knwon as Sábado de Gloria) is also called The Great Sabbath since it is on this day that Christ "rested" physically in the tomb. But it is also believed that it was on this day he performed in spirit the Harrowing of Hell and raised up to Paradise those held captive there.
Easter Sunday 
Easter, the celebration of Christ’s resurrection, is the queen of the Christian holy days. The word "easter" and the German "Ostern" come from common source, referring to the direction from which the sun rises. In other words, the word referred to the celebration of the spring sun, when all things returned to life. This symbolism was transferred to the resurrection of Christ who brings us new life. There is no evidence that the word "easter" was the name of a Anglo-Saxon goddess "Eostre." This is based on a passage in the writings of the Christian author, Bede, who in the eighth century erroneously ascribed the word to the goddess.
