Ordo Missæ celebrandæ et Divini Officii persolvendi pro anno liturgico 2025-2026. The 2026 Ordo outlines the celebration of Holy Mass in the Personal Ordinariate of the Chair of Saint Peter for each day of the ecclesiastical year according to Divine Worship: The Missal and the Roman Eucharistic Lectionary RSV-2CE, and adaptations for the Coverdale Psalms at mass on Sundays, Solemnities, and Feasts. For each day of the year, the Solemnities, Feasts, Memorials, Optional Memorials, and National Observances for celebrating mass in the USA and Canada are given along with the proper color of vestments and altar hangings. This Ordo also includes citations for psalms and first and second lessons at Morning and Evening Prayer for each day, as found in Divine Worship: Daily Office . The Ordo includes the entire 2026 Liturgical Year beginning with the First Sunday of Advent (30 November 2025) and the entire 2026 Calendar Year ending with the Seventh Day in the Octave of Christmas (31 December 2026). It is an indispensable resource for every sacristy, providing the information needed by priests, lectors, and altar guilds to prepare for the celebration of Holy Mass. For the lay faithful in their homes, it provides the citations for the readings for Mass and the Daily Office, allowing private review before or after attendance, as well as private or family participation in the Divine Offices of Morning and Evening Prayer.