This is the 7305th most frequent Spanish word.
greenday
The word "greenday" is not a Spanish word.
In this sentence, 'Greenday' is used as a proper noun representing the name of a musical band.
Escuché una canción de Greenday ayer y me encantó su energía.
I listened to a song by Greenday yesterday and loved its energy.
Here, 'Greenday' is utilized as a descriptive term, possibly metaphorically, to denote a day abundant with greenery and nature.
Hoy es un Greenday, porque el parque está lleno de naturaleza y flores verdes.
Today is a Greenday because the park is full of nature and green flowers.
In this example, 'Greenday' references the band, emphasizing the aesthetic choices of the individuals associated with it.