Whitsun proper preface be used for "six days after" and provided readings for the Eucharist on Monday and Tuesday in Whitsun week. Following the post-Vatican II Roman liturgical reforms and the suppresson of the Whitsun octave, Anglicans use the nine days between Ascension and Pentecost to reflect on the gift of the Spirit. For a great example of how this time can be used see Novena2012.
That said, hints of Pentecost remain in some contemporary Anglican provision for these first days of Ordinary Time. The readings provided for Evening Prayer in the CofI's daily office lectionary for Monday through to Wednesday of this week (Joel 2:18-29 & 1 Cor. 12:4-11; Genesis 11:1-9 & 1 Cor. 12:12-27; Ezekiel 37:1-14 & John 20:19-23) quite clearly reflect on the person, role and gift of the Holy Spirit.
The evening office lectionary for these days, then, allows for a continuation of the Pentecost theme. While the Office and the collect may be of Ordinary Time, there is nothing to prevent office hymns and occasional prayers at Evening Prayer echoing the celebration of Pentecost.
The aim of the liturgical reform's ending of the Whitsun octave was to restore to the Church the notion of sacred time, the nine days of prayer before Pentecost in communion the apostles and the Blessed Virgin. This, however, is not incompatible with a sense of the Pentecostal gift echoing in the Office in the days after the celebration of the feast. It does not undermine the unity of the great fifty days of the Paschal Season, but it does ensure that the Church's reflection on the gift continues. This, after all, is precisely why we celebrate the feasts of the Most Holy Trinity and Corpus Christi in the weeks following the end of the Paschal Season: to prayerfully reflect on the depth of the Paschal mystery in the life of the Church.