All Souls' Day - 2 November

Quoted in part from Learn Religions [1]:

All Souls['] Day is a solemn celebration in the Roman Catholic Church commemorating all of those who have died and are now in Purgatory, being cleansed of their venial sins and the temporal punishments for the mortal sins that they had confessed, and being made pure before entering into the presence of God in Heaven.

From worldometer.com [2]:

1,204,883 people have died so far from the coronavirus COVID-19 outbreak as of November 01, 2020, 23:20 GMT. 

A prayer for the deceased, from Divinum Officium [3]:

Fidélium ánimæ per misericórdiam Dei requiéscant in pace. Amen. (Latin)

May the souls of the faithful, through the mercy of God, rest in peace. Amen. (English)

 

From 2 Maccabees 12:44 [4]:

for if he were not expecting the fallen to rise again, it would have been superfluous and foolish to pray for the dead.

[1] https://www.learnreligions.com/what-is-all-souls-day-542460

[2] https://www.worldometers.info/coronavirus/coronavirus-death-toll/ (this link does not always work)

[3] https://divinumofficium.com/cgi-bin/horas/officium.pl,Tertia.

[4] https://bible.usccb.org/bible/2maccabees/12, at 44.