It is "¿Cuáles son tus/sus (singular/plural) planes para la tarde?"
.
La tarde.
Buenas tardes
Tarde mala.
3 pm is in the afternoon, so you would say "Buenas Tardes!" or, good afternoon!
Buenas Tardes
Buenos tardes. buenas tardes"Buenas tardes is how you say good afternoon in Spanish.Buenas tardes.Buenas tardes
buenas tardes doctores
Buenas tardes, facebookeros.
Yes, it is correct in the following type of construction: 'What do you have planned for this afternoon?' It means the same as 'What have you planned for this afternoon?' or 'What plans do you have for this afternoon?' or 'What have you got planned for this afternoon?' or 'What have you planned to do this afternoon?'
an afternoon nap in Spanish is called a siesta
a las 3 de la tarde