Nov. 1 is the Solemnity of All Saints.  +++   In 2021, this Solemnity is not a Holy Day of Obligation because the date falls on a Monday. Source: https://www.usccb.org/beliefs-and-teachings/what-we-believe/canon-law/complementary-norms/canon-1246/ )    +++   

Nov. 2 is the Commemoration of All The Faithful Departed.