Other than readings, what symbols distinguish feast days?
The priest may wear choicer quality vestments on feast days. Gold/bright vestments are worn on all feasts, except for those of the Holy Cross, of martyrs and the Beheading of John the Baptist, at which red/dark vestments are worn. Silver or blue vestments can be worn for feasts of the Blessed Virgin Mary. Sometimes more candles are lit on the altar and the Liturgy can be celebrated with greater solemnity.