Holy Saturday may not sound as important for others, but it is a significant day indeed. This day marks the last day of Lent and Holy Week. It is the day between Good Friday and Easter Sunday. During Holy Saturday, the altar is still completely bare. Holy Communion is not given to anyone except during the anointing of the sick and the dying.
A significant part of Holy Saturday is preparing for the celebration of the Easter Vigil mass. The Easter Vigil mass happens on the sundown of Holy Saturday, therefore Holy Saturday is a great day to prepare for it.
The Easter Vigil Mass concludes the Triduum. This is the only mass celebrated during the day. However, do take note that the Easter Vigil Mass is not like any other regular Saturday night mass; it is special and unique on its own.
On this holy night, the Church keeps watch, celebrating the resurrection of Christ in the sacraments and awaiting his return in glory. It is the turning point of the Triduum, the Passover of the new covenant, which marks Christ’s passage from death to life. Therefore, the Easter Vigil does not correspond to the usual Saturday evening Mass and its character is unique in the cycle of the liturgical year. – USCCB
The Service of Light
The Service of Light is part of the Easter Vigil mass and commences on the first part. This service is unique since the Church’s lights are all dimmed, and it takes place outside where an Easter fire is ignited, and the Paschal Candle is lit. A Paschal Candle is this enormous white candle that is used throughout Easter. Every year a new Paschal Candle is blessed and lit during the Service of the Light in the Easter Vigil.
During the Holy Saturday, the Liturgy of Baptism also commences. This is for those who are pursuing baptism and professing their faith. In the past, they say that the Easter Vigil served as the day where adult catechumens were baptized.
Unlike Good Friday, It is not required to fast and abstain from meat on Holy Saturday. However, it is well encouraged to fast until the Easter Vigil to prepare yourself for Jesus’ resurrection wholly.