En Mayo o Junio
What month does school end?
en que mes estamos means en que mes estamos in Spanish. However if you were wondering what it means in English it directly translates to "in which month we are"
You probably mean, "...que aprendes en la escuela?" This mean, "... that you learn in school."
"Que hay en tu escuela" in English means "What is in your school?"
"En que mes es la Navidad" means "In which month is Christmas".
It means "in what season is the month". Probably better to use "ser" here. "en que estación es el mes?"
Translation: What month are we in? Answer: Estamos en el mes de agosto (We are in the month of August)
Mi cumpleaños es en el mes de julio.
It means, "What month is it?" (Literally, "In what month are we?")
21 de diciembre
Nací el veintiocho de junio. Months are not capitalized in Spanish.
Las clases se acaban a las ...En castellano NUNCA SE DICE: "La escuela se termina a las..."