Holiday Calendar

Blonde Hair Day

Next celebratedMonday, May 31, 2027

Botticelli gave his Venus the hair of Simonetta Vespucci, and Renaissance women chased the same shade with chamomile bleach and rooftop sunlight. Blonde Hair Day belongs to a color people have manufactured for centuries.

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Last updated September 5, 2026 · by the Holiday Calendar TeamHave an update or spot an error?
YEARLY DATEMay 31
OBSERVED INUnited States
CATEGORYStyle
SUBCATEGORYHair
ORIGIN

Community Origin

FOUNDING ENTITY
Not documented
FIRST OBSERVED
Not documented
HOW THE HOLIDAY CAME TO BE

One May 31 date, circulating under several names.

Blonde Hair Day travels under several names on holiday-listing sites, among them National Blonde Day, World Blonde Day and International Blondes Day, all fixed to the same May 31 date, and salons and hair-care brands promote it opportunistically. No founder, establishment record or inaugural event has been identified for any of them.

+ Know the story? Submit a founder Help us complete this holiday
INTRO

How blond hair evolved twice, on opposite sides of the planet

On the Solomon Islands, in the South Pacific, between 5 and 10 percent of the indigenous population is naturally blond. The people there have deep brown skin. For years, researchers assumed the blond came from European sailors passing through.

It did not. Their blond hair traces to a gene that Europeans do not carry, which means the trait evolved twice, independently, on opposite sides of the world.

That is the trait Blonde Hair Day celebrates. It turns out to be rarer, older, and stranger than its reputation on a salon shelf.

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ORIGINS

Blonde Hair Day history

INTRODUCTION

The blonde look is not new, and it was rarely left to nature. People have chased the shade for centuries, first with sunlight and crude chemistry, and only recently with genetics.

May 31 sits on top of that long history. The observance itself is thin and modern, but the fascination behind it reaches back to antiquity.

CHAPTER 01

Manufactured on a Venice rooftop

Renaissance Venice turned blondeness into a craft. Women soaked their hair in chamomile-based bleaches, then climbed to a rooftop terrace, the altana, to dry it in the sun. To keep their skin fashionably pale, they wore a brimless hat called a solana that shaded the face while the hair lightened.

The formulas spread in printed recipe books. By then golden hair had become the era's ideal of beauty and status.

CHAPTER 02

Blonde in a bottle

Four centuries later, blondeness moved from the rooftop to the drugstore shelf. In 1955, copywriter Shirley Polykoff built a Clairol campaign around a single sly line: Does she ... or doesn't she?

It was the first advertising ever aimed at selling hair dye to a mass audience. A later Polykoff line asked whether blondes have more fun. Hair color stopped being a secret and became a purchase.

CHAPTER 03

A holiday with no author

The day itself has no such paper trail. No founder, no first celebration, and no official record explains Blonde Hair Day.

It surfaces on holiday-listing sites and in salon promotions with a fixed May 31 date, and it spreads mostly through social posts. That absence is common for a modern 'National ___ Day,' and it does not make the fascination behind the color any less real.

WHY THIS DAY MATTERS

Why We Love Blonde Hair Day

RESEARCH

Blond hair exposed a blind spot in genetics.

Most human-genetics research leans on people of European descent, which can skew which genes get credit for a trait. Blond hair proved it, when a Solomon Islands study found a gene Europeans do not carry and its authors warned that narrow samples give a very biased view of human traits.

CULTURE

Its cultural weight dwarfs its rarity

Naturally blond hair reaches real frequency only in northern Europe and the Pacific. Yet it saturates beauty imagery worldwide, far out of proportion to how few people actually have it.

SCIENCE

It is a favorite natural experiment

Blond hair switches on from very small genetic changes, which makes it easy to trace. Geneticists keep using it as a clean, visible window into how DNA shapes the human body.

BY THE NUMBERS

Blonde Hair Day by the Numbers

50%
Solomon hair-color variance from one gene
~20%
Drop in KITLG from the blond switch
>200
Gene variants linked to blond hair
7% to 50%
US women coloring hair after 1955 ads

TIMELINE

Timeline

First blonde-extinction scare

A newspaper frets that the blonde is 'becoming rapidly extinct,' the earliest known version of a myth that keeps returning.

Clairol makes blonde a choice

Shirley Polykoff's 'Does she ... or doesn't she?' becomes the first campaign to sell hair dye to a mass audience.

The fake WHO extinction study

Major outlets report a bogus World Health Organization study claiming blondes would die out by about 2202; the WHO denies it.

A different blond gene appears

A Stanford study shows Solomon Islanders' blond hair comes from a native TYRP1 variant, evolved independently of Europe.

European blond in one letter

Stanford researchers trace classic European blond hair to a single adenine-to-guanine change near the KITLG gene.

Not one gene, but hundreds

A UK Biobank study of nearly 350,000 people ties hair color to hundreds of genetic variants.

GOOD TO KNOW

Surprising facts about Blonde Hair Day

Blond once marked a Roman prostitute

In ancient Greece and Rome, sex workers bleached their hair or wore blond wigs because the color signaled lust, according to historian Julia Martins.

Botticelli's Venus was a real woman

The Renaissance blond ideal was embodied by Simonetta Vespucci, the Florentine noblewoman who modeled for Botticelli's 'The Birth of Venus.'

Solomon Islands blondness is recessive

A child there is born blond only when both parents carry the gene.

A landmark study used just 85 people

Scientists pinpointed the Pacific blond gene by comparing 43 blond and 42 dark-haired Solomon Islanders, a fraction of the usual sample size.

Some 'blond' genes shape hair, not color

Many of the genes tied to hair color actually control how hair grows or its texture, rather than its pigment.

GET INVOLVED

How to Celebrate Blonde Hair Day

EDITOR'S PICK

Learn how blond hair actually forms

Read up on the genetics, from Europe's single-letter DNA switch to the Pacific's TYRP1 gene. You may never see the color the same way again.

REFRESH

Refresh your color at the salon

Many salons and hair brands run blonde promotions around May 31. Book a gloss or highlights, or ask a colorist about a new shade.

BUST

Bust the extinction myth

Tell someone that no real WHO study ever predicted blondes would vanish. It is a true and satisfying way to correct a stubborn rumor.

SHARE

Share a blonde-hair photo online

The day travels mostly through social posts and hashtags. Add a throwback picture and pass it to friends.

LOOK

Look past the European stereotype

Read about naturally blond communities such as the Solomon Islanders. Notice how the same trait can appear through completely different genes.

Test your knowledge

How well do you know Blonde Hair Day?

1 / 8

Which gene gives Solomon Islanders their blond hair?

Answer

No. It is an unofficial, lighthearted observance, not a federal or public holiday, so schools, banks, and offices stay open.

COLOPHON

Sources

How we know what’s on this page. References, not endorsements.

7sources
1primary records
5independently dated
Primary records
Nature Communications2018
Genome-wide study of hair colour in UK Biobank explains most of the SNP heritability
Peer-reviewed study linking hair color to more than 200 genetic variants.
View source
Additional coverage
Stanford Medicine2012
Naturally blond hair in Solomon Islanders rooted in native gene, study finds
How a Stanford team found the gene behind blond Solomon Islanders.
View source
Stanford Medicine2014
Subtle change in DNA, protein levels determines blond or brunette tresses
Stanford research tracing European blond hair to a single DNA change.
View source
Snopes2002
Did WHO Study Conclude That Natural Blondes Are Likely To Be Extinct Within 200 Years?
Fact-check debunking the viral claim that blondes face extinction.
View source
Jewish Women's Archive
Shirley Polykoff
Biography of the copywriter behind Clairol's landmark hair-dye campaigns.
View source
NBC News2012
Genetic mutation may explain mysterious blond Solomon Islanders
News report explaining the recessive gene behind Melanesian blond hair.
View source
Julia Martins
Golden Locks: Hair Care in the Renaissance Era
A historian on how Renaissance women manufactured fashionable blonde hair.
View source
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