This April 27 Pope Francis will raise to the altars, Carlo Acutis, the first millennial saint of the Catholic Church. (Pending the Pope's good health)

Carlo was a British-born Italian website designer who documented Eucharistic miracles and approved Marian apparitions. He catalogued both on a website he designed before his death in 2006 from leukemia.
His website can be found here: www.miracolieucaristici.org
He was beatified by Pope Francis on 10 October 2020. After a second miracle attributed to the intercession of Acutis was confirmed in May 2024, Pope Francis granted approval in July 2024 to continue forward with canonization, which is scheduled for 27 April 2025. His canonization will be held during Jubilee of Teenagers, which is from Friday, April 25, to Sunday, April 27.
For canonizations and beautifications, this is what the 'Manuel of Indulgences' has to offer:
Grant 21
PRAYERS IN HONOR OF THE SAINTS AND BLESSEDS
In addition, in order to promote the veneration of newly proclaimed saints and blesseds, a plenary indulgence is granted a single time within the year following the canonization or beatification to those faithful who make a visit to a church or an oratory in which a solemn celebrations is held in honor of the saint or blessed, and who there devoutly recite the Our Father and the Creed. To any of the faithful who make the aforesaidpious visit during the same period, a partial indulgence is granted.
This means that any church or oratory that hosts a solemn celebration in honor of Carlo Acutis, within April 27 2025 - April 27 2026, would offer an indulgence. This would include the actual canonization event itself. Also, likely, churches associated with the saint, like the churches of his home town and home country.
Later in the year, Pier Giorgio Frassati will also be canonized. This indulgence would apply to him as well as anyone else who is canonized or beautified, at any time.
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