For what it’s worth, I’ve taken Communion twice in the same (calendar) day just a few weeks ago. I went to Mass in the morning for the Immaculate Conception, then again in the evening for “Sunday Mass” since I wasn’t going to be able to make Mass on Sunday morning due to an event where I was volunteering.
I received Communion at both Masses, in the same “day”. The rationale was that each Mass fulfilled a separate obligation: the holyday, and the Sunday obligation.
I was taught that “participation” means actively being a member of the congregation, responding to the prayers, paying attention to the readings and Gospel, and doing the things that the congregation does. Participation is not just doing things like being a Cantor, or an EM, or singing in the choir, or fulfilling some other “altar” role. After all, the Mass is an interaction between the celebrants, the congregation and God. By praising and worshipping, you are participating! This may not be the official definition of participating, but it’s what I was taught, and the way I see it, the Mass isn’t really complete without the PEOPLE of God. That’s US! As the old saying goes, “CH__CH-- what’s missing? U-R!” Put another way, The Mass of God isn’t complete without the “mass of people”.
