Holly Day is observed worldwide every December 19, celebrating the holly plant, a prominent decoration associated with Christmas and the winter holiday season. This unofficial holiday was created by Jace Shoemaker-Gallway, a freelance author known as the Queen of Holidays, to help people get into the festive spirit. Holly, particularly the common holly, is recognized for its bright red berries and glossy green leaves, which have historical significance in various cultures, including ancient Rome and Celtic traditions. The red berries symbolize the blood of Christ in Christian tradition, while the plant is commonly used in Christmas wreaths and garlands. Celebrations typically involve decorating homes with holly, singing carols like "Deck the Halls," and sharing the holiday on social media with the hashtag #HollyDay. Holly Day is part of a series of holidays that honor Christmas plants, including National Christmas Tree Day on December 8 and National Poinsettia Day on December 12.