1) Christian Sunday observance 
==Western Christianity== Trinity Sunday is celebrated in all the Western liturgical churches: Roman Catholic, Anglican, Lutheran, Presbyterian, Methodist and Baptist. ===Church year=== The Sundays following Pentecost, until Advent, are numbered from this day. In traditional Catholic usage, the First Sunday After Pentecost is on the same day as Tri...
Trinity Sunday, the octave of Pentecost, is a feast of very early institution. The name
[n] - eighth Sunday after Easter
noun eighth Sunday after Easter