Holiday Calendar

National Kristina Day

Next celebratedMonday, September 21, 2026

Kristinas can claim the most famous Christina of all, a Swedish queen born Kristina Augusta in 1626 and buried in St Peter's Basilica. September 21 marks the spelling American parents kept choosing.

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Last updated September 6, 2026 · by the Holiday Calendar TeamHave an update or spot an error?
YEARLY DATESeptember 21
OBSERVED INInternationally
CATEGORYNames
ORIGIN

Community Origin

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

A name with a paper trail, a day without one.

No founder, organisation or establishing record has been identified for National Kristina Day. Its earliest surviving trace is an archived third-party listing captured in August 2022, which dates that listing rather than the day, so the observance was in circulation at least that early and its own beginning stays undocumented.

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

American parents stopped changing their minds about the K

National Kristina Day lands on a name that Americans spent six decades quietly voting on. Kristina and Christina are two spellings of one name, and in the Social Security Administration's national birth data the K kept gaining. Across the 1930s it averaged 1.3 percent of the pair; across the 1980s, 24.0 percent.

Then it stopped. Every year since 1985 the K spelling has landed inside the same narrow band, and the trend across those forty years is a drift downward of about half a point. Both names have fallen hard since, and the split between them has barely moved.

A name day usually points at a person. This one points at a spelling decision, made over and over on American birth records, that has produced almost the same answer for four decades.

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ORIGINS

Kristina Day history

INTRODUCTION

Strip the name back far enough and it is a description. Behind the Name traces Kristina to Christiana, the Latin feminine of Christian, and Christian to the medieval Latin Christianus, which meant simply "a Christian."

Behind that sits Greek. Christos meant "anointed," from chrio, "to anoint," and it translated the Hebrew mashiyah, the word English prints as messiah. The Greek sits three steps back, behind two layers of Latin.

CHAPTER 01

A saint the record is not sure about

The name attached itself to an early saint, and the doubt is printed in the reference work itself. Behind the Name calls her "an early, possibly legendary, saint who was tormented by her pagan father." The oldest layer of this story arrives with a qualifier already attached.

CHAPTER 02

The queen the record names with a K

The K spelling reached the Swedish throne in the seventeenth century. The Law Library of Congress records that the monarch English calls Christina of Sweden was born Kristina Augusta in Stockholm in December 1626, and that she was the first Swedish female regent in her own right.

She abdicated on 6 June 1654 and converted to Catholicism. Her abdication document, signed at Uppsala, sits in the Swedish National Archives under the reference SE/RA/25.2/25/A. She died in Rome in 1689 and was buried in St Peter's Basilica, where a monument stands in her honour.

CHAPTER 03

America spells it with a C first

Christina is there in the first year of the Social Security Administration's national data, 1880. Kristina is not. The K spelling first appears in 1915, carried by five girls, at rank 4,618.

It reached the American top 1,000 in 1945. It peaked in 1985 with 5,566 girls, ranked 57th that year. The long trend since has been down.

CHAPTER 04

A day with no author

The observance itself leaves no such record. Nobody is on file as having started National Kristina Day, no body promotes or registers it, and September 21 has no documented reason attached to it.

So the name and the day sit on opposite sides of the record. The name has a trail running back through Uppsala and medieval Latin. The day that marks it does not.

WHY THIS DAY MATTERS

Why National Kristina Day Matters

EVIDENCE

Least moved of thirteen K and C spelling pairs.

Thirteen K and C spelling pairs were measured the same way across 1985 to 2025, and Kristina's share of its pair moved less than the other twelve. Narrowing the window to 2010 onward does not change the answer: on a sample a quarter the size of Katherine and Catherine's, it still moves less than theirs does.

PATTERN

Two spellings, one curve

In 2025 Kristina and Christina each stood 97.9 percent below their own highest year, and their annual counts still track each other at r = 0.998. They were never rivals, and the only thing that ever changed between them was the ratio.

RECORD

The day has no place in the federal record

The Federal Register carries no document naming National Kristina Day, in a search where Loyalty Day returns 36 documents. No official status turned up elsewhere either, so everything solid about the day comes from the name rather than from a statute.

BY THE NUMBERS

National Kristina Day by the Numbers

26.3%
Kristinas among US Kristinas and Christinas
6.0 pts
Kristina's US share against Christina, 41-year swing
45.6 pts
Karol's US share against Carol, 41-year swing
118
US girls named Kristina in 2025

GOOD TO KNOW

National Kristina Day Around the World

Norway

Statistics Norway's register counted 4,823 Kristinas against 4,647 Christinas at the end of 2025. The K spelling passed the C there in 2019, by five people, and has widened the gap every year since.

Swedish, Norwegian, Danish, Faroese, Estonian, Lithuanian

Behind the Name lists Kristina as a native form in all six.

Russian, German, Czech, Slovene, Serbian, Croatian, Macedonian, Albanian, Bulgarian

Behind the Name records Kristina in all nine, and in Bulgarian it doubles as a variant of Hristina.

English

Behind the Name files Kristina as an English variant of Christina as well, which is why American records can be read as one name in two spellings.

GET INVOLVED

How to Observe National Kristina Day

EDITOR'S PICK

Ask a Kristina which spelling her family chose

Behind the Name gives both spellings the same English pronunciation, yet the records file them as separate names. A birth-name file keeps the choice and never the reason.

LOOK

Look up her birth year in the national file

The Social Security Administration publishes one file per birth year going back to 1880, listing every name given to at least five children. The data page carries the download and the rules behind it.

READ

Read a national register, not a baby-name site

Statistics Norway keeps a public table of every first name held by more than 200 people in the country. It was last updated in January 2026, and it prints its own suppression rule.

SPELL

Spell it out before you write it down

The two spellings are pronounced the same in English, so a name heard correctly can still be written down wrong. Ask which one you are dealing with before her name goes on anything official.

CHECK

Check what else the date carries

The United Nations marks its International Day of Peace on September 21, set up by the General Assembly in 1981. Nothing in the record connects the two, and knowing that beats assuming a link.

Test your knowledge

How well do you know National Kristina Day?

1 / 7

In which year does Kristina first appear in the Social Security Administration's national name data?

Answer

No. It is an unofficial observance, and no government recognition of it was found in the records searched, so offices, schools and banks stay open.

COLOPHON

Sources

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

8sources
4primary records
4independently dated
Primary records
U.S. Social Security Administration2026
Popular Baby Names: Beyond the Top 1000 Names
One file per birth year since 1880, counting every name given to at least five children.
View source
Statistics Norway2026-01
Table 10501: Persons, by girls' or boys' name and year
How many people in Norway hold each first name, last updated in January 2026.
View source
United Nations2026
International Day of Peace
The UN's own page for the observance it marks on 21 September.
View source
Office of the Federal Register
Federal Register document search
Full-text search of federal documents, returning nothing for this day's name.
View source
Additional coverage
Behind the Name
Meaning, origin and history of the name Kristina
The languages that use this exact spelling, and the name days recorded for it.
View source
Behind the Name
Meaning, origin and history of the name Christina
Traces the name to Latin Christiana and hedges the early saint as possibly legendary.
View source
Behind the Name
Meaning, origin and history of the name Christos
The Greek root, anointed, and its link to the Hebrew word for messiah.
View source
Law Library of Congress2024-06
On this Day: Queen Christina of Sweden Abdicates June 6, 1654
Her birth as Kristina Augusta, the 1654 abdication, and the archived signing document.
View source
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