Also celebrated in some communions as Trinity Sunday. While some Universalists have always been Trinitarians -- at least a few -- the propers here barely line up.
Free Church Book of Common Prayer (1929)
Trinity Sunday or First Sunday after Pentecost.
Almighty and everlasting God, who hast given unto us thy servants grace by the confession of a true faith to acknowledge the glory of the eternal Trinity, and in the power of the divine majesty to worship the Unity; grant that by stedfastness in the same faith we may ever be defended from all evil; through Jesus Christ our Lord. Amen.
For Epistle: Rev. iv, 1-11 (end), or Rom. xi, 33-36 (end).
Gospel: John iii, 1-15, or Matt. xxviii, 18-20 (end).
A book of prayer for the church and the home (Universalist, 1866)
First Sunday after Whit-Sunday
O Lord our God, who by thy Son hast taught us that love is the fulfilling of the law and of the gospel; fill us, we beseech thee, with the spirit of universal charity, that we may love thee above all, and our neighbor as ourselves. Amen.
Gospel, St. John iii 1.
Epistle. 1 St. John iv. 7.