WDTPRS: Octave of Easter “in albis”, Quasimodo Sunday
In the post-Conciliar calendar this is the “Second Sunday of Easter.” It is sometimes called “Thomas Sunday” because of the Gospel reading about the doubting Apostle.
It is also famously called “Quasimodo Sunday” for the first word of the opening chant, the Introit (cf. 1 Peter 2:2-3). Quasimodo and Sicut modo are interchangeable. Quasimodo reflects a Latin Scripture version predating what became the Vulgate. So, today’s Mass begins by exhorting the newly baptized.
Oh yes… now it is often called “Mercy Sunday” because of the emphasis on the dimension of the mercy of God’s redemptive act celebrated at Easter. The newest, third edition of the Missale Romanum of 2002 specifically labels this