I have been explicitly told that we no longer teach that Sundays are days in which you **must **attend Mass. I have been told not to teach that it is a mortal sin to miss Mass (unless of course you have a good reason, sick, bad weather, travel etc…). Not even to Confirmation Candidates. Not even to adults. I have been told that people should want to come to Mass and not come our of an obligation. I think some of the thinking is that if people do not understand/know of the rule, they can’t be bound to it.
That is most unfortunate.
No, the Church has not changed. It is still a mortal sin to intentionally fail to attend Mass (insert all the usual conditions).
Now taking that a step further, is it possible as this thinking expands, could the bishops change the rule? If they did, it would keep many of the faithful out of mortal sin…which is kinda a goal of ours…
That depends on what you mean by “the bishops.” Some Catholics are surprised to learn this, but the answer is actually “yes.” The Church (meaning the Magisterium) could change this. It would require a change to canon law, which any pope could do on his own authority, or it could be done by an Ecumenical Council (which requires the pope’s assent). An individual conference of bishops (United States, for example) could not do this.
Many Catholics today are surprised to learn that the law requiring all Catholics to attend Mass every Sunday, as a universal law, did not exist until sometime in the 19th century. Before then, there were local laws (we might say “regional” or based on the political geography of the time) that either did or did not require attending Mass on every Sunday.
Remember that keeping the Lord’s Day holy is a Divine Command, however, the specific way that we do that, which today means attending Mass (as a start) is a rule of the Church, and it actually can be changed. Even today, in the Eastern Churches, the Sunday precept can be fulfilled by attending the Divine Praises (the Liturgy of the Hours) for some Churches
sui iuris.
So, even though this might surprise you, the answer is actually “yes.” The Church could indeed change the laws to make attending Sunday Mass less than obligatory under pain of mortal sin.