In order to relieve the poor souls in purgatory, particularly in this time of crisis when prayers for the deceased have greatly diminished in number and in fervour. We encourage you to pray earnestly for the dead during the month of November. By visiting a cemetery and praying even mentally each day from November 1st to the 8th, one may also gain a plenary indulgence for the faithful departed.

Read more on how to gain indulgences:
https://sspx.org.nz/en/news-events/news/how-gain-indulgences-69541