(Classical) Greek has words for spring, εαρ (ear < PIE *wes-r- 'spring, cf. Latin ver, Sanskrit vasanta, Old Irish errach 'spring', Old English had lencten whence Lent < PIE *del- 'long', also English long, per Faldonem supra), and summer θερος (theros).

Quote:
Even as when the daughter of Pandareus, the nightingale of the greenwood, sings sweetly, when spring is newly come, as she sits perched amid the thick leafage of the trees, and with many trilling notes pours forth her rich voice in wailing for her child, dear Itylus, whom she had one day slain with the sword unwittingly, Itylus, the son of king Zethus. (Homer, Odyssey, xix:520ff.)

Ceci n'est pas un seing.