How to ask someone what today is, in Spanish.

Explanation 1: If you want to ask someone the what today is, you say: Hoy es____________ ?                     Today is...  In order to ask what the day is, you need to know how to say the days of the week in Spanish.

Explanation 2: You can use this information to ask a classmate what day you take a test in Spanish class.   ¿Cual es la fecha de hoy?                  What's today's date?