Anochecer is a beautiful Spanish word that refers to dusk or nightfall, capturing the exact moment the sun goes down.
In the song, the band sings about sharing "aliento y suspiros tibios al anochecer" (breath and warm sighs at dusk). It sets a highly romantic and cinematic scene for the lovers as they transition from a dreamy day into a passionate night together.
This song is a huge, romantic declaration about a love that feels absolutely perfect. The singer starts by asking, "Quizás te puedas preguntar / Qué le hace falta a esta noche blanca" (Maybe you ask yourself / What this white night is missing), and the answer is... nothing at all! Their love is an adventure that needs nothing added. It's about finding joy in the small moments, like walking in the rain together or traveling on a train, which feel like a "sueño difícil de creer" (a dream hard to believe).
It's a very public kind of love, with the couple described as "dos locos" (two crazy people) smiling at everyone they pass. The feeling is so strong that it makes time itself slow down: "tan enamorado de ti / Que la noche dura un poco más" (so in love with you / that the night lasts a little longer). He even makes a wild promise to love his partner "más allá de la vida" (beyond life), swearing he'll love them even more in the afterlife. It's all about a love that is completely satisfying, right here and now.