We are coming up to the Sunday of Pentecost. On this day we acknowledge and celebrate the Holy Spirit. Red is the color that is used on days that seem to have more to do with Holy Spirit, so red is the color for Pentecost, on June 4 this year.
The Sunday after Pentecost is Trinity Sunday, the day we celebrate the Holy Trinity. The color for this day will be white because it is a festival day.
The creed that traditionally been used on Holy Trinity Sunday is the Athanasian Creed. Most historians agree that it originated in Gaul around 500AD. As a historic collection of authoritative doctrinal statements, it is one of the three ecumenical creeds that Lutherans subscribe to. I like this creed a lot for one main reason. It uses a lot of words, one and half single-spaced pages, trying to explain the Trinity (LBW, pages 54 – 55). By the time you’re done you don’t really understand the Trinity any better than when you started.