para su cumpleaños

for their birthday

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phrase Rare #29,553
for their birthday “Su” can mean his, her, your (formal), or their, depending on context.
SP: Compré un libro para su cumpleaños.
EN: I bought a book for their birthday.

Pensé que alguien merecía algo especial para su cumpleaños.

I thought someone deserved something special for their birthday.

Él nunca olvida llamar a su madre para su cumpleaños.

He never forgets to call his mother on her birthday.

¿Qué le compramos a ella para su cumpleaños?

What should we get her for her birthday?

Mary recibió muchos regalos para su cumpleaños.

Mary received many gifts for her birthday.

Quiero avisarte que voy a casa para su cumpleaños.

I want to let you know that I'm coming home for his birthday.

— Un día de furia (1993)

Tom no sabe lo que Mary quiere que él le compre para su cumpleaños.

Tom doesn’t know what Mary wants him to buy her for her birthday.

¿Qué le compramos para su cumpleaños?

What should we get him for his birthday?

Le conseguí a Tom una pelota de fútbol para su cumpleaños.

I got Tom a soccer ball for his birthday.

¿Qué dijiste que le habías regalado para su cumpleaños?

What did you say you’d given him for his birthday?

¿Vas a comprar su regalo de nuevo para su cumpleaños?

Are you going to buy them a gift again for their birthday?

— Estación Zombie: tren a Busan (2016)

Tom le preguntó a Mary qué quería para su cumpleaños.

Tom asked Mary what she wanted for her birthday.

Desde entonces, para su cumpleaños siempre nos las arreglamos para salir.

Since then, we always manage to go out for her birthday.

— Parásitos (2019)