Ne'er Cast a Clout Till May Be Out

A clout is not a blow in this rhyme. It is an old word for a piece of cloth, and from there a piece of clothing, so the line means do not throw off a layer too early. That part is settled. The other half has been argued over in print for well over a century, because nobody can prove whether "May" is the month of May or the may-tree, the hawthorn whose white blossom fills English hedges in late spring.

It is one of the shortest rhymes children learn, closer to a weather warning than a song, and it survives because it keeps being right. British spring is famous for handing out a warm week in April and then taking it straight back.

Origins

The earliest known printing is in Thomas Fuller's Gnomologia: Adagies and Proverbs, Wise Sentences and Witty Sayings, Ancient and Modern, Foreign and British, published in 1732. Fuller gives it as "Leave not off a Clout till May be out". His book was a collection of sayings already in circulation rather than original writing, so the proverb was in people's mouths before 1732. How long before is unknown, and there is no reliable earlier citation.

Several forms are recorded. The compact "Ne'er cast a clout till May be out" is the one most people know. A longer version runs "Button to chin, till May be in; cast not a clout, till May be out". Northern English and Scots speakers say "Ne'er cast a cloot till May be oot".

Other European languages carry near-identical advice. A Spanish proverb runs "Hasta el cuarenta de mayo no te quites el sayo", meaning do not take off your coat until the fortieth of May, which lands on 9 June. A French one warns "En avril, ne te découvre pas d'un fil", do not shed a single thread in April.

Meaning & Interpretation

Before central heating, getting the timing wrong was a real risk rather than an inconvenience. Most people worked outdoors or in unheated buildings, clothes were expensive and worn in layers, and a cold snap after you had packed away your winter things meant weeks of being cold. The proverb is a caution against optimism.

The meteorology behind it holds up. Warm spells in April and early May are regularly followed by cold air pushing down from the north, and frost is still possible across much of Britain into late May. Gardeners work to the same rule when they hold back tender plants. A related country term, "blackthorn winter", describes the cold snap that often arrives while the blackthorn is in flower in April.

What does "clout" mean here?

Clout comes from the Old English word clut, meaning a patch or a small piece of cloth or metal. By the time the proverb was written down it commonly meant a rag, a patch, or an item of clothing, which is the sense used here. The other clout, a smack with the open hand, is a separate strand of the word and has nothing to do with the rhyme.

Does "May" mean the month or the hawthorn?

This is genuinely unresolved, and both readings have serious support. The hawthorn case rests on ordinary English usage: hawthorn is widely called the may or the may-tree, and "the may is out" is a normal way to say the blossom has opened. A flowering signal is also more useful than a calendar date, because a tree responds to the actual season while 31 May does not. The month case rests on the wording and the company the proverb keeps. "Till May be out" reads most naturally as a month ending, the longer variant "button to chin till May be in" only works for a month since a tree cannot be in, and the Spanish and French parallels are unambiguously about calendar dates.

Neither side can close the argument, because the proverb circulated in speech long before Fuller printed it and no early text explains itself. The 1752 switch from the Julian to the Gregorian calendar muddies things further: Britain dropped eleven days, so blossom that had opened around the start of May under the old reckoning now appeared in the second week, which means the two readings once pointed at roughly the same moment and could easily have blurred together.

Is the advice still accurate?

The weather part still works, since late frosts have not gone away. The hawthorn part has shifted. Hawthorn in Britain now flowers noticeably earlier than it did several decades ago, often in late April, so the two readings no longer line up at all. If you follow the blossom you will strip off sooner than if you follow the calendar.