It's known as El Gordo de La Lotera (Or The Fat Lottery) and happens every 22nd of December in Spain. This tradition has been taking place continuously since 1812 and it's the second oldest lottery in the world.
The game features a fun and colorful version of the classic Lotera game, which players can enjoy online. The gameplay is simple and intuitive, with players using their mouse or touch screen to select and mark off the different cards on their game board.