It means, "...the number of days in January..."
CUantos dias hay en el mes de enero means how many days are in the month of January.
"De" is of or from. "Enero" is January. "A las" is what precedes a time. So, "From January at..."
Dame tu numero de telefono means give me your telephone number
The second of January.
I have your number.
January first is el primero de enero in Spanish.
"January 10th" in Spanish is "el diez de enero".
The population of Primero de Enero is 27,813.
It is how you express a date in Spanish. "Es el diez de enero de 2011" means "It is the 10th of January 2011." Note that the months are not capitalized in Spanish.
Numero de meid de digitos
mobile-phone/cellphone number
eleven compluneoanos is January