The Glorious Twelfth is observed in the United Kingdom on August 12 and marks the beginning of the shooting season for red grouse in Great Britain and Northern Ireland. This day is significant for hunters, as it is one of the busiest in the shooting season, with many red grouse being shot. The Game Act of 1831 established regulations for hunting game birds, including designated open and close seasons. For red grouse, the open season runs from August 12 to December 10. It is important to note that hunting is prohibited on Sundays and Christmas Day, which can lead to the Glorious Twelfth being postponed to the following day if it falls on a Sunday. The event has faced challenges in recent years, including adverse weather conditions and fluctuations in grouse populations.