National Best Friends Day 2026: Date and 11-3-6 Rule

There’s a date on the calendar that doesn’t require a gift receipt or a formal invitation—just a friend who knows you well. National Best Friends Day, observed on June 8, is that rare holiday with no pressure except to show up for the people who matter most.

Date: June 8 annually · Official Recognition: Not a federal holiday · Popular Hashtag: #NationalBestFriendsDay · Primary Purpose: To honor closest friends

Six key facts one overview: the holiday has a fixed date, an unofficial status, and a few recurring questions about related celebrations.

What is a national bestfriend day?

National Best Friends Day is an annual celebration dedicated to honoring the bond shared with a closest friend. The day is observed on June 8 in the United States and the United Kingdom, according to National Today (holiday calendar site). It is not a federally recognized public holiday; as Remitly (financial services blog) notes, it remains an unofficial observance.

History of National Best Friends Day

• Several U.S.-based explainer pages trace the holiday to a 1935 congressional effort to dedicate a day to close friends (National Today).
• The Alachua County Library District (public library system) states that in 1935 the U.S. Congress devoted a day each year in tribute to close friends.
• Some secondary pages say Congress chose June 8 because it was considered a balmy day in all regions of the United States, though that detail remains uncorroborated (Alachua County Library District – low confidence).
• Alternatively, some sources claim the best-friends observance became a modern social-media-era holiday with recorded celebrations beginning around 2011 (Calendar.cx (less authoritative)).

The implication: the most widely repeated origin story—a 1935 congressional resolution—has no primary source citation, making the holiday’s true beginnings a historical blank spot.

Difference from International Friendship Day

National Best Friends Day is distinct from International Day of Friendship, which the United Nations (U.N. observances office) proclaimed for July 30 in 2011. The World Friendship Crusade advocated for a friendship day long before the UN designation (Remitly). In the United States, Friendship Day is commonly observed on the first Sunday in August, separate from Best Friends Day (BetterHelp (online therapy platform)).

What day is National Best Friends Day in the UK?

Does the UK celebrate on a different day?

• The same date (June 8) applies in the United Kingdom, according to Remitly, which notes the holiday is increasingly celebrated around the world.
• BBC Newsround, a children’s news outlet, states: “It’s on 8 June every year” (cited in research notes).

Is it the same as the US?

Yes—the observance is the same. Any differences are cultural rather than calendar-based. Britons may plan pub meetups or small gatherings, while Americans often post on social media. The date remains consistent.

The catch: because National Best Friends Day has no official government backing, there is no single authority ensuring uniform observance. The UK date is identical but arises from informal cultural adoption rather than legislative mandate.

What is the 11 3 6 rule of friendship?

How does the rule work?

• The 11-3-6 rule of friendship says it takes about 11 meetings, each around 3 hours, over 6 months to turn an acquaintance into a trusted friend, according to the Fort Worth Star-Telegram (regional newspaper).
• A sister article by the Sacramento Bee (regional newspaper) repeats the same formula: roughly 11 meetings of 3 hours within 6 months.
• A different framing from PureWow (women’s lifestyle site) describes a “3:6 rule” that requires three meaningful interactions over six weeks, with at least two in person.

Who created the 11 3 6 rule?

The rule is being framed in 2026 as a mainstream social psychology guideline rather than a formal scientific law (Fort Worth Star-Telegram – medium confidence). Its exact origin is unclear; no single researcher or institution claims authorship. It functions more as a popular heuristic—a useful benchmark for adults trying to build deeper connections in a busy world.

The implication: the rule is a helpful heuristic but not a prescription.

What are the 4 types of friends?

Acquaintances, casual friends, close friends, best friends

Modern social taxonomy often includes four levels: acquaintances (brief contact), casual friends (shared hobbies), close friends (emotional trust), and best friends (deep mutual loyalty). This framework helps people assess their social circles without over-investing in superficial relationships.

Aristotle’s classification of friendship

• National Today summarizes Aristotle’s friendship theory as three types: utility, pleasure, and virtue.
• Days Of The Year (holiday directory) also attributes three friendship types to Aristotle: utility, pleasure, and perfect friendship.

The trade-off: the ancient Greek model predates the modern four-tier system and is more philosophical. Utility friendships end when the benefit stops; pleasure friendships fade when the fun ends; only virtue friendships (mutual good will) endure. The modern four-type scale is more practical for everyday life but lacks the depth of Aristotle’s ethical framework.

When is National girl best friends Day?

What is GFS day?

National Girl Best Friends Day—sometimes abbreviated as GFS day—is often cited as August 1 or October 1, but sources conflict. The date confusion is unresolved, as noted in the clarity section below. No single authoritative source claims ownership of this observance.

Is there a female friend day?

Several informal “female friend” days appear on social media calendars throughout the year, but none have the same traction as National Best Friends Day. The ambiguity around dates (August 1 vs. October 1) reflects how these unofficial holidays proliferate online without central coordination.

The pattern: the lack of a fixed, recognized date for National Girl Best Friends Day means the celebration’s meaning is diluted. In contrast, the June 8 date for National Best Friends Day has been stable for years, giving it stronger cultural weight.

For anyone with a best friend across the miles, the choice is clear: pick up the phone on June 8, or risk letting the day slip by without acknowledgment. Distance should never excuse ignoring a day built for reaching out.

Also check out our guides on How Many Days Until Christmas? and Crazy Hair Day Ideas for other fun calendar celebrations.