Holiday Calendar

International Friendship Month

Next celebratedMonday, February 1, 2027

A month-long international observance across February that encourages people to value, strengthen, and reconnect across friendships and cultures.

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Last updated February 26, 2026 · by the Holiday Calendar TeamHave an update or spot an error?
YEARLY DATEAll of February
OBSERVED INInternationally
CATEGORYRelationships
SUBCATEGORYFriendship
ORIGIN

Community Origin

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

A friendship month no one signed.

No founder, organization, proclamation, or campaign establishing International Friendship Month could be documented. It circulates informally through online holiday calendars and friendship-themed promotion, encouraging cross-cultural connection across February. It is separate from the dated friendship days that do have records: the United Nations International Day of Friendship on July 30 and the United States National Friendship Day on the first Sunday in August.

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INTRO

What a calendar can teach you about staying alive

In 2023 the U.S. Surgeon General put a number on something most people treat as a soft luxury. Being socially disconnected, the advisory found, carries a mortality impact similar to smoking up to 15 cigarettes a day. Friendship, read that way, is not decoration. It is a survival factor.

International Friendship Month sits in February with none of the usual machinery behind it. No founder. No proclamation. No sponsoring office that anyone can name. It simply appears on calendars each year, asking a quiet question the science now answers loudly.

That question is whether the people around you are good for you, and the evidence says they are. Loneliness raises the risk of an early death by nearly 30 percent. A month with no author turns out to point at one of the most documented findings in public health.

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ORIGINS

International Friendship Month history

CHAPTER 01

A number for how many people you can really know

For most of human history, no one tried to count friendship. Then in the early 1990s the anthropologist Robin Dunbar did. Plotting primate brain size against the size of their social groups, he extrapolated a ceiling for humans of about 150 stable relationships.

The number came with structure. Inside the 150 sit smaller rings: roughly 50 you would invite to a big party, 15 you lean on, and an inner 5 you would call in a crisis. Friendship, in this view, is not one pool but a set of nested circles, each one harder to enter than the last.

CHAPTER 02

The price of a close friend, in hours

If Dunbar measured the ceiling, Jeffrey Hall measured the climb. The University of Kansas researcher tracked new acquaintances and found that closeness runs on time. It took roughly 50 hours to turn a stranger into a casual friend, and more than 200 hours to reach a close one.

The catch was what counted. Hours spent hanging out, talking, and joking moved the needle. Hours merely sharing an office did not. You can sit near someone for years and never cross the line into friendship, because proximity is not the same as attention.

CHAPTER 03

A recession you cannot see

By 2021 researchers were tracking a decline. The share of Americans reporting no close friends at all had quadrupled since 1990. The connections Dunbar and Hall described as natural were, for many people, quietly going missing.

This is where a month with no founder earns its place. International Friendship Month has no proclamation and no origin story to tell, and that absence is honest. What it offers instead is a recurring cue, landing in February, to spend the hours the research says a friendship actually costs.

WHY THIS DAY MATTERS

Why International Friendship Month Matters

Survival

Strong social ties tracked with a 50 percent better chance of survival.

A 2010 review pooling 148 studies and more than 308,000 people found that those with strong social ties had a 50 percent greater likelihood of survival. The effect held across age, sex, and starting health, which is why researchers now rank social connection alongside the classic risk factors doctors already screen for.

Scale

The need is not a niche problem

The Surgeon General's advisory reported that about half of U.S. adults have experienced loneliness. A reminder aimed at friendship is not addressing a fringe concern. It speaks to something a large share of people are already feeling.

Bridges

It reaches across cultures, not just calendars

The observance frames friendship as something that crosses borders, the same premise the United Nations used when it created its own friendship day in 2011. A friendship between people from different places is treated as a small act of diplomacy. The idea is that goodwill scales upward from individuals to communities.

TIMELINE

Timeline

A friendship day enters the calendar

The United States begins marking the first Sunday in August as National Friendship Day, following a congressional resolution. It is a separate observance from the February month, and the two are often confused.

Dunbar proposes a ceiling

Anthropologist Robin Dunbar argues that humans can maintain about 150 stable relationships, a figure he derives from primate brain and group-size data.

Connection is linked to survival

A meta-analysis of 148 studies finds that strong social relationships track with a markedly higher likelihood of survival, ranking connection with established mortality risks.

The UN names July 30

The United Nations General Assembly proclaims July 30 the International Day of Friendship, on the premise that friendship can build bridges between cultures and countries.

Friendship gets a price tag in hours

Jeffrey Hall's study quantifies how friendships form, estimating the hours of shared time it takes to move from acquaintance to close friend.

Loneliness is called an epidemic

The U.S. Surgeon General issues a formal advisory declaring loneliness and isolation a public-health epidemic and urging a national push toward stronger social connection.

GOOD TO KNOW

Surprising facts about International Friendship Month

Your job will not make you friends by itself

Hall's research found that sharing a workplace barely moves a relationship toward friendship. What counts is unstructured time spent talking and joking, not hours logged at adjacent desks.

The collapse was steep, and fast

In 1990, about a third of Americans said they had ten or more close friends. By 2021 that share had fallen to roughly one in eight, a drop in a single generation.

Even the best friend is getting rarer

In 1990, about three-quarters of Americans said they had a best friend. By 2021 that had slipped to under six in ten, so even the closest tie is less common than it was a generation ago.

There are three friendship dates, not one

International Friendship Month runs through February, the UN's International Day of Friendship falls on July 30, and the U.S. National Friendship Day lands on the first Sunday in August. They are three separate observances.

GET INVOLVED

How to Observe International Friendship Month

EDITOR'S PICK

Reconnect with one drifting friend

Pick a person you have lost touch with and send a real message, not a like. February is a low-stakes excuse to reopen a door you let close.

SCHEDULE

Schedule the hours, do not wish for them

Closeness runs on shared time, so put a standing walk, call, or meal on the calendar. A repeating slot beats a vague promise to catch up someday.

REACH

Reach across a culture or border

Make a point of connecting with someone whose background differs from yours. The observance frames friendship as something that crosses lines, not just deepens existing ones.

CHECK

Check on someone who has gone quiet

Loneliness is common and easy to hide, so reach out to a friend who has been withdrawn. A short, direct message asking how they really are can matter more than you expect.

INTRODUCE

Introduce two friends who should know each other

Widen someone else's circle, not just your own. A thoughtful introduction can start a friendship that outlasts the month.

Test your knowledge

How well do you know International Friendship Month?

1 / 7

The 2023 U.S. Surgeon General's advisory compared the mortality impact of social disconnection to what?

Answer

No. The International Day of Friendship is a single date, July 30, proclaimed by the United Nations in 2011, while International Friendship Month spans all of February.

COLOPHON

Sources

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

8sources
6primary records
7independently dated
Primary records
U.S. Surgeon General2023
Our Epidemic of Loneliness and Isolation: The U.S. Surgeon General's Advisory
The 2023 federal advisory declaring loneliness and isolation a public-health epidemic.
View source
PLOS Medicine2010
Social Relationships and Mortality Risk: A Meta-analytic Review
A review of 148 studies linking strong social ties to a 50 percent higher chance of survival.
View source
University of Kansas2018-03-06
Study reveals number of hours it takes to make a friend
Jeffrey Hall's finding that closeness takes roughly 50, 90, and 200-plus hours of shared time.
View source
Survey Center on American Life2021
The State of American Friendship: Change, Challenges, and Loss
2021 survey documenting the decline in Americans' close friendships since 1990.
View source
The Conversation2021
Dunbar's number: why my theory that humans can only maintain 150 friendships has withstood 30 years of scrutiny
Robin Dunbar explains the 150 ceiling and the nested layers of human friendship.
View source
United Nations2011
International Day of Friendship
The UN page marking July 30 as the International Day of Friendship, proclaimed in 2011.
View source
Additional coverage
PBS NewsHour2023-05-02
Loneliness poses health risks as deadly as smoking, U.S. surgeon general says
Coverage of the 2023 advisory's cigarette comparison and the near-30 percent early-death risk.
View source
Wikipedia
Friendship Day
Background on the various friendship observances and their differing dates and origins.
View source
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