Whitsunday
.White Sunday. The seventh Sunday after Easter, to commemorate the “Descent of the Holy Ghost” on the day of Pentecost. In the Primitive Church the newly-baptised wore white from Easter to Pentecost, and were called albaʹti (white-robed). The last of the Sundays, which was also the chief festival, was called emphatically Dominʹica in Albis (Sunday in White).
Another etymology is Wit or Wisdom Sunday, the day when the Apostles were filled with wisdom by the Holy Ghost.
(Compare Witten-agemote.)
“We ought to kepe this our Witsonday bicause the law of God was then of the Holy Wyght or Ghost deliured gostly vnto vs.”—Taverner (1540).
“This day is called Wytsonday because the Holy Ghost brought wytte and wysdom into Christis disciples … and filled them full of ghostly wytte.”—In die Pentecostis (printed by Wynken de Worde).