Pentecost season, also known Pentecostide, as well as the time of Sundays after Pentecost or Sundays after Trinity, is a liturgical period, celebrated by some Christian churches, which immediately follows the Easter season. Although the start and end dates vary by liturgical tradition, the season typically begins on the day of Pentecost and continues throughout the rest of the liturgical year, ending just before the season of Advent. The liturgical color for this period is typically green or red.
Traditionalist Catholicism has an eight-day Octave of Pentecost, followed by Sundays after Pentecost that continue through to the end of the liturgical year.
The various forms of the Roman Rite all use the color green for this period.
Moravianism
In the Moravian Church, the Pentecost season runs from the Feast of Pentecost itself to the Reign of Christ, the last Sunday of the liturgical year.[1] Red is the liturgical color used for Pentecost Sunday; white is the liturgical color used for Trinity Sunday and Reign of Christ Sunday; green is the liturgical color used for the other Sundays of the Pentecost season.[1]