41 Why is it an obligation to participate at Mass on Sunday? Because Jesus Christ rose from the dead on Sunday. The Resurrection of Christ is the central event of Christ’s whole life and of our Christian Faith. “And if Christ has not been raised, our preaching is useless and so is your faith” St. Paul tells us (1Cor 15,14). Sunday is the Dies Domini (the Day of the Lord), a holy day in the life of the Church, for the community of the faithful and for every believer. The Day of the Lord is also a day of solidarity and of sharing with the poor because the Eucharist is a bond of fraternity and a source of communion. By dedicating time to the Lord every Sunday and on the holy days established by the Church, everybody, as individuals and members of a family can rediscover the hierarchy of values on which he should model his life, and therefore learn to make use of his free time, in union with God, his Creator and Redeemer, to dedicate his Christian and human talents for the good of all in society. This is why it is important to safeguard Sunday as a day that is free of work, especially in countries that have Christian roots. 122