Whitmonday, also known as Pentecost Monday, is an important Christian holiday that commemorates the descent of the Holy Spirit upon the apostles. It is traditionally celebrated on the Monday after Pentecost Sunday. While Whitmonday is the most commonly used term for this day, there are other synonyms that refer to the same holiday, such as "Holy Spirit Monday", "White Monday", and "Monday of the Spirit". In some countries, it is also known as "Green Monday", "Rose Monday", or "Wit Monday". Regardless of the name, this day is a time for prayer, reflection, and celebration for Christians across the world.