Devuélveme is the command form for "give me back". It's a powerful and emotional word that combines the verb devolver (to return) with the pronoun me (me).
In the chorus, Aitana sings the heartbreaking line, "Ahora devuélveme mi 6 de Febrero" (Now give me back my February 6th). She's not asking for a physical object, but demanding the return of a precious memory and the love she lost on that specific day. This poetic plea makes it a deeply memorable and unique word.
This song is about a very specific kind of heartbreak, the kind that has a date attached to it. Aitana sings about a relationship that started on February 6th, a day that was once special but now feels stolen. She remembers a winter when they were together, but now she's alone in her "cuarto azul" [blue room], and the cold feels much worse without him.
She's trying to cope by "bailando para no llorar más" [dancing so I don't cry anymore], but she can't escape his memory. The real sting comes when she wonders if she was just a rebound, singing, "tal vez tú me usaste / Para olvidarte de otra que no olvidaste" [maybe you used me / to forget another girl you hadn't forgotten]. In the end, all she wants is her day back. She doesn't ask for the world he promised, just for him to "devuélveme mi 6 de Febrero" [give me back my February 6th].