The Diocese of Saginaw advises parishioners that the usual daily Mass will not be livestreamed on Tuesday because the annual Chrism Mass is taking place that day. 

The Chrism Mass will be livestreamed in place of the daily Mass, but it will have a later start.

“Please note there will be no 8 a.m. livestream Mass from the Cathedral on Tuesday, April 12 due to the 10:30 a.m. Chrism Mass, which will be livestreamed,” the diocese posted on Facebook. 

The Chrism Mass is an annual ceremony typically conducted during Holy Week, the U.S. Conference of Catholic Bishops (USCCB) explained. 

During the ceremony, Bishops consecrate enough of each of the three oils for every church in their diocese to use for the year, Simply Catholic said. 

The celebrant consecrates three oils — the Oil of the Sick, the Oil of the Catechumens, and the Chrism — during the Mass, the USCCB said. 

Each oil has a special purposes and they are used accordingly throughout the year, Simply Catholic said. 

It described the purpose of each oils as follows:

The Oil of the Sick is used in the Sacrament of the Anointing of the Sick. During the sacrament, a priest typically lays hands on a sick or elderly person, prays for him, and anoints him with oil on his head and hands. 

The Oil of the Catechumens is used to anoint children and adults before they are baptized. 

Chrism oil is used to consecrate someone to God, such as during the Sacrament of Confirmation. 

The week between Palm Sunday and Easter is known as Holy Week, Britannica says. This year, it starts Sunday. During Holy Week, Catholics commemorate Judas' betrayal of Jesus, the institution of the Eucharist, Jesus' Passion and crucifixion, his burial and his Resurrection.