The answer is: Cuando es verano
Answer:
In English we might say "I am going --- to go --- somewhere.
In Spanish, Voy a (I am going) ir (to go))
Voy, vas, va, van are just forms of the verb ir, the conjugation tells who is going.
For example: I am going (voy)
You are going (vas) (singular)
he/she/it is going (va) (singular)
they are going (van) (plural)
Explanation: