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Slytherin Pride Day

An international fan observance on March 21 celebrating Slytherin, one of the four houses of Hogwarts in the Harry Potter series, and the traits associated with it.

Sunday
21
March 2027
Last updated March 21, 2026 · by the Holiday Calendar Team
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YEARLY DATEMarch 21
OBSERVED INInternationally
CATEGORYPop Culture
SUBCATEGORYMovies & TV
ORIGIN

Community Origin

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

A fan tradition with no documented author.

No documented founder or formal establishment record has been identified for Slytherin Pride Day. It circulates among Harry Potter fans as the second day in a four-day stretch that assigns each Hogwarts house its own date in late March, a sequence that grew up alongside the official March house-pride promotions run by Pottermore and Wizarding World.

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INTRO

The house nobody asked for, and the fans who claimed it anyway

Of the four houses sorted by the Hogwarts Sorting Hat, Slytherin is the one most people are sorted into and least want to be. Fans who came up green tend to describe the same first reaction, somewhere between disappointment and dread, because the books taught a generation that the snake house was where the villains came from. Slytherin Pride Day exists to argue the opposite.

Here is the twist the stereotype never accounts for. When a 2023 analysis sorted 51,246 Twitter users by personality and matched them to houses, Slytherin came out the most common house on Earth, the top result in 69 countries. The house readers love to cast as the exception is, by that measure, the rule.

The reclamation has an unusual ally. The franchise that built the stereotype has spent years walking it back, publishing official features with headings like "Not every Slytherin is a total git" and arguing in print that the house "was not a breeding ground for evil." On March 21, fans and brand end up pulling in the same direction, defending a house against a reputation the story itself handed it.

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BY THE NUMBERS

Slytherin Pride Day by the Numbers

69
Countries where Slytherin ranks first
51,246
Twitter users in the 2023 house study
4
Hogwarts houses, one date each in March
Mar 21
Slytherin's day in the house sequence
ORIGINS

Slytherin Pride Day history

INTRODUCTION

For a long time, the screen turning green was a small heartbreak. Writers describing their Pottermore sorting recall the same scene: the quiz returns Slytherin, and the new member's first instinct is to retake it, certain a mistake has been made. That reflex is the reputation problem in miniature, and it was built into the story on purpose. The four houses sort children into easy shorthand, with the ambitious sent to a house whose most infamous alumni include the series' central dark wizard, and a narration told largely from a rival house's chair. The villain label stuck hard enough that being sorted green felt, to many, like an accusation.

CHAPTER 01

A house worth defending

The case for Slytherin starts with separating the founder's prejudice from the traits he prized. In the fiction, Salazar Slytherin valued ambition, cunning, resourcefulness, and determination, qualities that are neutral on their own and only read as sinister in a story that hands them to its antagonists. Fans rebuilding the house's image point to characters the books themselves complicate: a spy who played a long and dangerous game, a young wizard who turned against the dark side, a teacher who came back to fight. The official position lands in the same place, with Wizarding World arguing that the house produced "wizards full of flaws and desires just like anyone else."

CHAPTER 02

From sorting quiz to house pride

The reclamation needed a place to gather, and the franchise built one. When the official Pottermore platform let fans take a sorting quiz and claim a house as their own, house identity became something to wear rather than just read about. Pottermore and Wizarding World leaned in, eventually running a month-long House Pride campaign each March across dozens of territories, inviting fans to show their colors. The official campaign celebrates all four houses together and never assigns a calendar day to any one of them.

CHAPTER 03

Where March 21 comes from

The specific dates are the fans' own invention. Out of the March house-pride season, the community settled into a four-day rhythm that gives each house a day of its own: Hufflepuff on the 20th, Slytherin on the 21st, Gryffindor on the 22nd, and Ravenclaw on the 23rd. No founder, first post, or establishing announcement has been traced for Slytherin Pride Day, and the per-house dates are a fan convention rather than an official decree. That is the honest shape of it: a grassroots date, observed worldwide, with no author to credit.

TIMELINE

Timeline

Salazar Slytherin founds his house

In the series' internal history, one of Hogwarts' four founders establishes Slytherin and selects students for ambition and cunning, setting the lore the day draws on.

The brand defends the house

Wizarding World publishes "6 reasons it's okay if you get sorted into Slytherin" and "Why Hogwarts needs Slytherin house," arguing in print against the villain stereotype.

Culture press joins the reclamation

The Mary Sue runs a first-person essay on coming to terms with a Slytherin sorting, capturing the wider shift in how fans talk about the house.

A first-person Slytherin essay

Wizarding World publishes Amelia Tait's account of being sorted Slytherin and learning to embrace it, interviewing other fans who made the same peace.

Slytherin tops a global study

A personality analysis of more than 51,000 Twitter users finds Slytherin the most common house worldwide, the leading result in 69 countries.

WHY THIS DAY MATTERS

Why We Love Slytherin Pride Day

Reframe

Cunning is only a vice when the villain has it.

Ambition, cunning, and self-preservation are flaws only in a tale told from a rival house's chair. The day reframes them as ordinary drive, the same qualities that read as heroic when they belong to someone else.

Alignment

Fandom and franchise agree for once

It is rare for a rights holder to argue against its own most famous shorthand. Yet Wizarding World has published feature after feature defending the snake house, so the reclamation fans push on March 21 has the brand quietly pushing alongside it.

Belonging

It turns a dreaded result into an identity

Plenty of fans cried at the screen when the quiz returned green. The day gives that moment a different ending, a chance to claim a house on purpose rather than apologize for it.

Not every Slytherin is a total git.
Wizarding WorldOfficial Harry Potter site
Not everyone in those green and black robes must have been pure evil.
Brittany K. AllenThe Mary Sue

AT A GLANCE

Slytherin house at a glance

Founder (in the fiction)
Salazar Slytherin
Emblem
The serpent
Colors
Green and silver
Element
Water
Common room
In the castle dungeons
House ghost
The Bloody Baron
Prized traits
Ambition, cunning, resourcefulness, determination

GOOD TO KNOW

Surprising facts about Slytherin Pride Day

Nobody chose this, a computer did

The study that crowned Slytherin did not ask anyone their house. It read the language of more than 51,000 people on Twitter, scored their personalities, and matched the traits to houses, then handed Slytherin the worldwide lead it never volunteered for.

Slytherin's day is the second of four

March 21 only makes sense as part of a set. Fans give each Hogwarts house its own consecutive date, with Hufflepuff on the 20th, Slytherin on the 21st, Gryffindor on the 22nd, and Ravenclaw on the 23rd.

The official campaign has no calendar days

Pottermore and Wizarding World run a month-long House Pride campaign every March across dozens of territories, but it celebrates all four houses together. The single-day dates that fans observe are theirs, not the brand's.

Even the house ghost is in uniform

Slytherin's resident spirit, the Bloody Baron, is described on the official site as covered in silver bloodstains. He is also the only figure at the school said to keep the resident poltergeist in line.

MYTH VS FACT

Common Misconceptions

The myth

Every Slytherin is a villain.

The truth

The franchise's own site rejects this directly, calling Slytherin not a breeding ground for evil but a house of flawed, ordinary people, and points to members who fought on the right side.

The myth

Slytherin Pride Day is an official Warner Bros. or Pottermore holiday.

The truth

The official house-pride effort is a month-long March campaign celebrating all four houses at once, with no calendar day set aside for any single house. The March 21 date is a fan convention.

GET INVOLVED

How to Celebrate Slytherin Pride Day

EDITOR'S PICK

Wear the green and silver

Slytherin's colors are green and silver and its emblem is the serpent. Pull on a scarf, a pin, or a snake motif and let the house show.

TAKE

Take or retake the sorting quiz

The official Wizarding World site runs a sorting experience that assigns you a house. Try it, or retake it, and see whether the hat puts you in green.

REVISIT

Revisit the story through Slytherin eyes

Reread or rewatch with the snake house in focus, tracking the characters the villain label tends to flatten, from the spy to the teacher who came back to fight.

SHARE

Share your house pride online

Fans gather on Tumblr and other social platforms to post art, headcanons, and house pride. Add yours with the day's house-pride tags and find the rest of the dungeon.

MAKE

Make the case for cunning

Pick one Slytherin trait the story treats as suspect, ambition or self-preservation or resourcefulness, and argue it back into the daylight. That reframing is the whole point of the day.

Test your knowledge

How well do you know Slytherin Pride Day?

1 / 8

Which date do fans observe as Slytherin Pride Day?

Answer

It is observed on March 21 each year, the second day in a four-day fan sequence celebrating the Hogwarts houses.

COLOPHON

Sources

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

9sources
6primary records
8independently dated
Primary records
Wizarding World2016-09-09
Why Hogwarts needs Slytherin house
Official Harry Potter feature defending the house against the villain stereotype, stating it was not a breeding ground for evil and naming members who fought for the right side.
View source
Wizarding World2016-01-28
6 reasons it's okay if you get sorted into Slytherin
Official feature headed "Not every Slytherin is a total git," the earliest of the brand's reclamation pieces, listing reasons the house is unfairly maligned.
View source
Wizarding World2019-09-23
How I learned to stop worrying and love being a Slytherin
First-person essay by Amelia Tait on being sorted into Slytherin and overcoming the stereotype, with interviews of other Slytherin-sorted fans.
View source
Wizarding World2020-08-23
The symbolism of Slytherin house
Official reference for the house's identity: green and silver colors, the serpent emblem, the water element, and the Bloody Baron as house ghost.
View source
Wizarding World
Slytherin, Official Harry Potter Encyclopedia
Official fact file naming founder Salazar Slytherin, the house values of ambition and cunning, the dungeon common room, and the reputation rooted in the founder's prejudice.
View source
Pottermore Publishing2024-05-07
Four Houses. One month. Hogwarts House Pride campaign
Publisher case study describing the official month-long March House Pride campaign across dozens of territories, celebrating all four houses together with no per-house calendar day.
View source
Additional coverage
United By Pop2022-03-23
It's Hogwarts House Pride Week!
Culture article documenting the four-day fan tradition and the specific per-house dates, presenting the March 21 Slytherin date as fan convention rather than official.
View source
The Mary Sue2018-05-23
How I Came to Terms With the Hogwarts House I Never Wanted
First-person culture essay on the Slytherin villain stereotype and reclaiming the house, the source of the line about green and black robes not meaning pure evil.
View source
TheToyZone2023-05-17
The Most Common Hogwarts House in Every Country and U.S. State
Original 2023 study analyzing 51,246 Twitter users by personality and matching them to houses, finding Slytherin the most common house worldwide, first in 69 countries.
View source
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