The dedication of a church is important in the life of a local Church. It can be considered as the birth date of a particular Christian community. Annually the dedication of a church is commemorated and celebrated as a solemnity. Therefore every community has two feasts. The first is the feast of the patron as guide, example and intercessor of the community and the second is the feast of the community as a Church.
In a diocese, the date of the dedication of the Cathedral is important. The Cathedral is the concrete sign as a diocese. The Cathedral is considered the mother of all churches in the diocese and the principal church of the whole diocese. This is how important the date of the birth that it should be celebrated by the whole diocese in their respective parishes as a feast and at the Cathedral itself as a solemnity which is the highest rank in the liturgical days.
August 14 is a feast proper to the local Church of Cubao. It is the anniversary of the Dedication of the Mother Church of the Diocese of Cubao, the Immaculate Conception Cathedral. The Cathedral itself observes the anniversary of its dedication as a SOLEMNITY and it is observed as a FEAST in the rest of the diocese. It is celebrated both in the Eucharist and the Liturgy of the Hours. The formularies for the Mass presidential prayer (collect, prayer over the gifts and prayer after communion), are found on pages 830-832 of the Philippine Edition of the Third Typical Edition of the Roman Missal in English, and the scriptural readings (old testament and new testament, gospel and responsorial psalm) will be from the Common of the Dedication of a Church.