'Ne'er cast a clout till May be out'

'Ne'er cast a clout till May be out' is an English proverb. The earliest citation is this version of the rhyme from Dr. Thomas Fuller, Gnomologia, 1732, although it probably existed in word-of-mouth form well before that:
"Leave not off a Clout Till May be out.

So when will I get the chance to put my "thicker" socks away for the summer