World Day for Grandparents and the ElderlyThe Apostolic Penitentiary, in order to increase the devotion of the faithful and for the salvation of souls, by virtue of the faculties attributed to it by the Supreme Pontiff Pope Francis by Divine Providence on the occasion of the the World Day of Grandparents and the Elderly, recently instituted by the Supreme Pontiff on the fourth Sunday of the month of July, graciously grants the Plenary Indulgence, under the usual conditions (sacramental confession, Eucharistic communion and prayer according to the intentions of the Supreme Pontiff) to grandparents, the elderly and all the faithful who, motivated by a true spirit of penance and charity, will participate on 25 July 2021, on the occasion of the First World Day of Grandparents and the Elderly, in the solemn celebration that the Most Holy Father Francis will preside over in the Vatican Papal Basilica or at the various functions that will be held throughout the world, who may also apply it as suffrage for the souls in Purgatory.
See the Decree here
Plenary Indulgence, A plenary indulgence (with the usual requirements) can be gained by visiting, in presence or virtually, through the media, the elderly in need or in difficulty.
Also those elderly who are sick elderly or housebound for serious reason, can also gain a plenary indulgence when they "unite spiritually with the sacred services of the World Day, offering to the Merciful God their prayers, and the pains and sufferings of their lives, especially while the words of the Supreme Pontiff and the various celebrations are broadcast through the media.”
https://www.catholicculture.org/culture/liturgicalyear/calendar/day.cfm?date=2023-07-23
I had not heard of this. It looks like yesterday the 4th Sunday. I guessed I missed it this year. They don't put things like this in our bulliten. Is there a website that reliably lists all important dates on the Cahtolic calendar?