Me encanta el día en que es su cumpleaños.

I

Breakdown of Me encanta el día en que es su cumpleaños.

• ser: to be
• el día: the day
• el cumpleaños: the birthday

Questions & Answers about Me encanta el día en que es su cumpleaños.

Why do we say el día en que es su cumpleaños instead of el día cuando es su cumpleaños?

In Spanish, el día en que is a common formal way to refer to the day on which something happens. While el día cuando can sometimes be heard informally, el día en que sounds more standard and natural in most contexts, especially in writing and formal speech.

Why is es used here instead of está?

The verb ser indicates a permanent or characteristic trait, and in this context it's establishing a specific date—the birthday date is an unchanging fact. Using está would suggest a more temporary state, which doesn't really apply to a date.

What does su mean here?

Su is the possessive adjective that can mean his, her, their, or even your (formal) in Spanish. Its meaning depends on the context. Because the sentence doesn’t clarify the person, you have to figure it out from context, or you can replace su with something like de él (his) or de ella (her) to be more specific.

Why do you say me encanta instead of yo encanto?