In broad terms, “the Easter duty” usually refers to a fully initiated Catholic’s obligation to make a good sacramental confession and receive holy Communion every year around the time of Easter.
Today, the church’s law does not mandate an “Easter duty” as such.
What are my Easter duties?
Bishops add some spiritual ‘meat’ to St. Patrick’s Day dispensations
With St. Patrick’s Day falling on a Lenten Friday this year, many U.S. bishops have issued dispensations from abstinence on March 17, allowing the faithful to enjoy the American Irish tradition of eating corned beef (or ham) and cabbage in good conscience.
Papal vaccine campaigns offered punishments, rewards 200 years ago
When popes were king, they ordered all their subjects in the Papal States to be vaccinated, using punishments and rewards to convince the hesitant and making sure the poor and the prisoners were inoculated as well.