National Chai Day is observed worldwide on September 21, celebrating the popular Indian beverage known as masala chai. This unofficial holiday was established in 2018 by Somrus, a US-based producer of India-inspired liqueurs, to promote its Chai Cream Liqueur. On this day, people are encouraged to enjoy a cup of chai or chai latte, either at local tea and coffee shops or by making it at home using various spice blends, teas, milks, and sweeteners. Masala chai, which translates to "mixed-spice tea," typically includes ingredients like cardamom, ginger, and black tea, and is often served with milk and sweeteners. The celebration of National Chai Day also invites participants to share their chai experiences on social media using the hashtag #NationalChaiDay.