Veranos literally translates to "summers". While a common word, its use in this song is beautifully poetic and specific to the nostalgic theme.
Instead of saying fifty years have passed, the lyrics say "Más de cincuenta veranos" (More than fifty summers). This choice of word perfectly connects to the song's beach setting (playa) and evokes a powerful feeling of a long-lost summer love, measuring a lifetime of waiting in warm, memorable seasons.
This song tells a beautiful and bittersweet story about a love that has lasted a lifetime, even if only in memory. The singer recalls meeting someone special on a beach, a moment shared with "Tú, el mar y el cielo" (You, the sea, and the sky). It was their first meeting, but it was so powerful that the singer made a promise on the day they said goodbye: to see that person again.
But then comes the twist. A huge amount of time has passed. The singer reveals, "Más de cincuenta veranos / Hace hoy que no nos vemos" (More than fifty summers / have passed today since we've seen each other). Despite the decades, the memory is still perfectly clear. This song is the singer keeping a promise, writing "la canción más bonita del mundo" (the most beautiful song in the world) to prove that "este loco de poco se olvida" (this crazy person forgets little), no matter how many years go by.