Seijin no Hi, or Coming of Age Day, is a Japanese holiday celebrated on the second Monday of January. It honors young people who have turned 20 years old in the past year, marking their transition into adulthood. This day is significant as it symbolizes new responsibilities and rights, including the legal ability to vote and drink alcohol. On Seijin no Hi, ceremonies are held across the country, often at local city halls or community centers. Young adults typically dress in formal attire, with many women wearing kimono and men donning suits. The day includes speeches, celebrations, and gatherings with family and friends.