There“s a choral festival in January, which takes place in the Pinar, the pine woods.
You can eat at Carlitos, the wonderful king of the Pancakes (be sure to go to the "Real Carlitos", which is called "El Amanecer de Carlitos y sus hijos"; a legal fight ended with the original Carlitos losing his original name). An awesom variety of pancakes, from honey and white cheese to salted pancakes, like the rochefort and avocado pancake.
You also can eat at the Pasteleria Holandesa, a charming old Dutch restaurant lost in the sand streets, where you can take a hearty breakfast which includes fruit alad and a fried egg.