People celebrate pentecost by decorating there churches with lots of white and red. Red is the colour of flames and is the symbol of the holy spirit. white is for goodness. the priest wears red robes at penticost.
Pentecost is the birthday of the Christian church. It is 50 days after Easter. On the first Pentecost, the tongues of fire came upon the apostles and they began to speak in tongues. The liturgical color is red.