From the Institute of Christ the King Sovereign Priest:
Visit a cemetery this week!
From November 1-8, a plenary indulgence, applicable to the souls in Purgatory, may be obtained each day by visiting a cemetery (Coemeterii visitatio) and praying, even if only mentally, for the departed. The indulgence is plenary each day from the 1st to the 8th of November; on other days of the year it is partial.
May the souls of the faithful departed, through the mercy of God, rest in peace.
~Image: Catholic cemetery, by SCF, November 2019.
~Definition of indulgences, here.