From the Editor's Desk (Friday, November 2, 2018, Gaudium Press) Catholics can gain special indulgences for the faithful departed during the first eight days of November.
The latest edition of the Enchiridion of Indulgences tells us how:
1. A plenary indulgence, applicable only to the souls in purgatory, is granted to the faithful who,
1. on any and each day from November 1 to 8, devoutly visit a cemetery and pray, if only mentally, for the departed;
2. on All Souls' Day (or, according to the judgment of the ordinary, on the Sunday preceding or following it, or on the solemnity of All Saints), devoutly visit a church or an oratory and recite an Our Father and the Creed.
Catholics can also gain a partial indulgence throughout the rest of the year:
2. A partial indulgence, applicable only to the souls in purgatory, is granted to the faithful who
1. devoutly visit a cemetery and at least mentally pray for the dead;
2. devoutly recite lauds or vespers from the Office of the Dead or the prayer Eternal rest
The "Eternal rest" prayer, or "Requiem aeternam" is:
"Eternal rest grant unto them, O Lord, and let perpetual light shine upon them. May they rest in peace."
The conditions for gaining the indulgence are:
Do the work while in the state of grace
Make a sacramental confession within 20 days
Pray for the Pope's intentions
Have no attachment to sin, even venial sin (this can involve resolving to love God and reject sin).
Source Catholic Herald