In the liturgical calendar, the color for each day corresponds to that day's main liturgical celebration, even though Optional Memorials (perhaps with a diff. Thanksgiving Day is a major feast of the church, and is patterned on numerous historical days with the same purpose. According to Marion J.
Hatchett's Commentary on the American Prayer Book, "Many of the earliest liturgical celebrations seem to have been associated with harvest times," including the Jewish feasts of Passover, Pentecost. The colors for major festival days and seasons are listed below in order of the Christian Year. For lesser festivals not listed below, such as Transfiguration, commemorations of saints, baptism, and marriage, use white.
For commemorations of martyrs and Reformation, use red. For Thanksgiving, different faith traditions use green, red or white. Liturgical colours are specific colours used for vestments and hangings within the context of Christian liturgy.
The symbolism of violet, blue, white, green, red, gold, black, rose, and other colours may serve to underline moods appropriate to a season of the liturgical year or may highlight a special occasion. These are the colors of the Liturgical Year. In the Catholic Church, each season has a color and each color has a meaning.
Here is the guide to the colors of the Liturgical Year and what they mean. A color chart showing the various colors used in the sanctuary for the seasons of the Christian Church Year, as well as the dates for the current year. The liturgical color during Thanksgiving is still green, which reminds me of what Paul said in the verse before that, 2 Corinthians 9:10: "He who supplies seed to the sower and bread for food will supply and multiply your seed for sowing and increase the harvest of your righteousness." Our God is a God of seed, sowing, growth, and harvest.
Color, like music, plays an important role in the life of God's worshiping people. Just as music is the "handmaiden to theology," liturgical color complements the message of the seasons and occasions during the church year. The Liturgical Colors, and their meanings, are: White: The color of perfection, glory, purity, joy, the robe of the glorified Christ and the angels.
White is used on the "joy" days and seasons (Christmas, Epiphany, Easter, Thanksgiving) or on the festival of the Godhead (Holy Trinity Sunday). The start of Advent brings a new color to the altar and clergy vestments. Traditionally, liturgical colors are important symbols indicating different holy days and events in the Episcopal calendar.