What does this spanish statement mean? el dos de.?

The context it is in is "El dos de diciembre" diciembre in spanish is december and there are a few more. What does �Cu�l es la fech de hoy? what does this mean? and 2 more, "�El D�a de San Valent�n es el trece de enero? #3 is A�o Nuevo? I would very much appreciate it if you could answer any of these :D or even just one. Informal spanish or formal spanish is perfect :D Thank you in advance!!!