January first
The second of January.
"January 10th" in Spanish is "el diez de enero".
"It's the fourteenth of January"
"Voy a verte el veinticinco de enero." Or..."Te veré el veinticinco de enero", or..."Nos vemos el veinticinco de enero".
January first is el primero de enero in Spanish.
El seis de enero
'Saint Valentine's Day is the 13th of January'.
el 30 de enero de 2009 (el treinta de enero de dos mil nueve)
It means, January first. The first day of the year.
In English that translates to, Saint Valentine's Day is January 13th
CUantos dias hay en el mes de enero means how many days are in the month of January.
You would say "el veinticinco de enero". Remember that the names of the months are not capitalized in Spanish.