An indispensable day!
30. It is clear then why, even in our own difficult times, the identity of this day must be protected and above all must be lived in all its depth. An Eastern writer of the beginning of the third century recounts that as early as then the faithful in every region were keeping Sunday holy on a regular basis.(36) What began as a spontaneous practice later became a juridically sanctioned norm. The Lord's Day has structured the history of the Church through two thousand years: how could we think that it will not continue to shape her future?
The pressures of today can make it harder to fulfil the Sunday obligation; and, with a mother's sensitivity, the Church looks to the circumstances of each of her children. In particular, she feels herself called to a new catechetical and pastoral commitment, in order to ensure that, in the normal course of life, none of her children are deprived of the rich outpouring of grace which the celebration of the Lord's Day brings. It was in this spirit that the Second Vatican Council, making a pronouncement on the possibility of reforming the Church calendar to match different civil calendars, declared that the Church "is prepared to accept only those arrangements which preserve a week of seven days with a Sunday".(37) Given its many meanings and aspects, and its link to the very foundations of the faith, the celebration of the Christian Sunday remains, on the threshold of the Third Millennium, an indispensable element of our Christian identity.