There are five conditions set down in canon law by which a baptized Christian who is not Roman Catholic can receive with us.
The smarty-pants answer is that it happens all the time. There’s no security check at Communion stations. Ushers seldom rack up more than a couple of Communion-line tackles in a long career. So every Sunday just about everyplace, a Lutheran or Presbyterian or Druid sneaks in. Perhaps the person has not read the statement of the U.S. bishops printed in the worship aid about who’s in and who’s out when it comes to Holy Communion. Perhaps they are operating on the theology of their own churches, which can be summed up by saying that once you’re in the water, you’re at the table.
Over the course of history the season of preparation for Easter Sunday has ranged from one day (in the first century) to 44 (today in the Roman church).
"The 40 days of Lent" has always been more of a metaphor than a literal count. Over the course of history the season of preparation for Easter Sunday has ranged from one day (in the first century) to 44 (today in the Roman church). Officially since 1970, Lent begins on Ash Wednesday and ends at sunset on Holy Thursday.