When is Kiss Your Girlfriend Day?

It is observed on November 17. The romantic sense of the day is the one tied to this date.

Is it the same as National Girlfriend Day?

No. National Girlfriend Day is August 1 and celebrates female friendships, while Kiss Your Girlfriend Day on November 17 is the romantic day for kissing a partner.

Who started Kiss Your Girlfriend Day and why is it on November 17?

It circulates as an informal social-media observance encouraging people to kiss their romantic partner, and our record places it on November 17. No documented founder exists and no source explains why this exact date was chosen.

Do all cultures kiss romantically?

No. A 2015 survey of 168 cultures found the romantic kiss in only 46 percent of them, and it was absent in several forager and horticultural societies.

Kiss Your Girlfriend Day

Next celebratedTuesday, November 17, 2026

A kiss for the romantic kind of girlfriend, not the platonic August 1 kind; the gesture itself was first recorded on Mesopotamian clay tablets around 2500 BCE.

See how to celebrate

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Last updated August 31, 2026 · by the Holiday Calendar TeamHave an update or spot an error?

YEARLY DATENovember 17

OBSERVED INUnited States

CATEGORYRelationships

SUBCATEGORYRomance

ORIGIN

Community Origin

FOUNDING ENTITY

Not documented

FIRST OBSERVED

Not documented

HOW THE HOLIDAY CAME TO BE

A prompt that spreads by social post alone.

Kiss Your Girlfriend Day circulates as an informal social-media observance encouraging people to kiss their romantic partner, and its traces run to posts and listings rather than to any organisation. No founder, establishing organisation or first observance is on record.

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

INTRO

The gesture half the world never adopted

We tend to assume everyone kisses, but they do not. One survey of 168 cultures found the romantic, mouth-to-mouth kiss in fewer than half of them, just 46 percent. Kiss Your Girlfriend Day, marked each November 17, celebrates a gesture that is far less universal than it feels.

One quick clarification before the affection starts. This is not National Girlfriend Day, which falls on August 1 and honors close female friendships. The word girlfriend carries two meanings, a female friend and a romantic partner, and this day is squarely the romantic one.

There is no founder to thank for it. The day has no recorded creator and no establishing record, the kind of low-key prompt that spreads online without an author. What it lacks in paperwork, the kiss itself more than makes up for in history.

ORIGINS

Kiss Your Girlfriend Day history

INTRODUCTION

The kiss is older than almost anything written about it. The earliest known record of romantic kissing sits on Mesopotamian clay tablets from about 2500 BCE. A 2023 analysis named those tablets as the oldest record, roughly a thousand years older than the Indian texts long treated as first.

For a long time, textbooks named India as the cradle of the kiss. Vedic Sanskrit texts from around 1500 BCE describe lovers pressing mouths together, and that was treated as the first record. The Mesopotamian tablets quietly rewrote the timeline.

CHAPTER 01

Two kinds of kiss, written down at the start

Those same tablets already split kissing into two kinds. One was the friendly or parental kiss of greeting and respect. The other was the romantic lip kiss between partners.

That split keeps reappearing. The Romans drew the same line in their own vocabulary, with separate words for a polite greeting kiss and a lover's kiss. A kiss could also seal a betrothal or close a business deal.

CHAPTER 02

The emperor who tried to ban it

Kissing was so routine in Rome that the emperor Tiberius moved against it. Between AD 14 and 37 he issued a formal order against the customary daily kiss. He hoped to slow a disfiguring facial disease called mentagra.

Historians cite the order as the earliest recorded attempt at social distancing. It did not work. Romans kept kissing.

CHAPTER 03

Many beginnings, no single source

Kissing was once thought to have spread out of South Asia with Alexander the Great's armies. The current view is different. Kissing appears to have developed independently across civilizations rather than radiating from one origin.

The modern day has a far humbler and far blurrier start. Kiss Your Girlfriend Day surfaced on social media as an unsigned prompt, the kind that circulates on platforms like TikTok and Urban Dictionary without any founder or founding date. Its history belongs to the gesture, not to the observance.

WHY THIS DAY MATTERS

Why We Love Kiss Your Girlfriend Day

ANTHROPOLOGY

The more stratified the society, the more often partners kiss.

A 2015 survey of 168 cultures found that the more socially stratified a society is, the more often romantic kissing appears. The gesture this day celebrates tracks human social organization, not just biology.

SCIENCE

It points to a measurable stress effect

In a Lafayette College study, kissing lowered the stress hormone cortisol in every participant. It cut stress more than hand-holding did.

BIOLOGY

It shapes a couple's shared microbiome

Couples who share at least nine intimate kisses a day end up with significantly more similar oral bacteria. The small daily gesture this day marks leaves a measurable trace partners carry in common.

BY THE NUMBERS

Kiss Your Girlfriend Day by the Numbers

46%: Cultures with romantic kissing
~2500 BCE: Oldest recorded romantic kiss
80M: Bacteria per 10-second kiss
700+: Bacteria types in the mouth
34: Facial muscles a kiss can use

TIMELINE

Timeline

Earliest recorded kiss

Mesopotamian clay tablets record both a friendly-parental kiss and a romantic-erotic one, the oldest written evidence of kissing.

Tiberius bans the daily kiss

The Roman emperor ordered an end to the customary daily kiss to curb the skin disease mentagra, and the ban failed.

Kissing hormone study presented

A Lafayette College study presented at the AAAS meeting found oxytocin rose in men but fell in women after kissing, a result the lead researcher called unexpected.

The 80-million-bacteria study

Researchers reported that a ten-second kiss can transfer up to 80 million bacteria, in a study of 21 couples.

The 46 percent finding

A 168-culture survey showed romantic kissing is present in only 46 percent of cultures, overturning the idea that it is universal.

Earliest kiss re-dated

An analysis moved the first recorded romantic kiss back to about 2500 BCE Mesopotamia, roughly a thousand years earlier than thought.

GET INVOLVED

How to Celebrate Kiss Your Girlfriend Day

Open the day with a real kiss

Make the first kiss of November 17 a deliberate one rather than a rushed peck. The day exists for exactly this small gesture between partners.

PLAN

Plan a date built around closeness

Choose a setting where a quiet moment is easy, like a slow dinner or a walk after dark. Affection lands better without a crowd and a clock.

Share the strange science of kissing

Tell your partner that a ten-second kiss can pass up to 80 million bacteria, or that kissing has its own field of study called philematology. The facts make for a memorable conversation over dinner.

POST

Post the date so couples get it right

Note that this romantic day is November 17, not the August 1 friendship day with a similar name. A quick share spares your friends the mix-up.

RECREATE

Recreate an old-fashioned greeting kiss

Trade the modern peck for a kiss on the hand or cheek, the kind Romans reserved for greetings. It is a small nod to a gesture thousands of years deep.

Test your knowledge

How well do you know Kiss Your Girlfriend Day?

1 / 7

Roughly what share of cultures practice romantic, mouth-to-mouth kissing?

Answer

No. It is an unofficial social observance, not a public or federal holiday, so it is a normal working day with no closures or time off.

COLOPHON

Sources

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

8sources

2primary records

7independently dated

Primary records

ScienceDaily2015

Romantic kissing is not the norm in most cultures

A 168-culture survey finding the romantic kiss present in only 46 percent of societies.

View source

ScienceDaily2014

Up to 80 million bacteria sealed with a kiss

A study of 21 couples measuring the bacteria a ten-second kiss transfers between partners.

View source

Additional coverage

Scientific American2023

The First Kiss in Recorded History Dates Back Nearly 5,000 Years

How a 2023 study re-dated the earliest recorded kiss to about 2500 BCE Mesopotamia.

View source

Science News2009

Kissing chemistry

A Lafayette College study tracking how kissing changes cortisol and oxytocin levels.

View source

The American Journal of Medicine2013-05-28

Science of Kissing

A physician's overview of philematology, the muscles a kiss uses, and its physical effects.

View source

History.com2023

The Ancient Origins of Kissing

Why kissing appears to have developed independently across civilizations rather than from one source.

View source

Haaretz2026-01

A Dirty Little Habit: Kissing in Ancient Rome

How Rome distinguished greeting and lover's kisses, and Tiberius's failed ban on the daily kiss.

View source

Merriam-Webster

Girlfriend (Definition)

The dual meaning of girlfriend as both a female friend and a romantic partner.

View source

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