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31th vs. 31st — Which is Correct Spelling?

By Tayyaba Rehman — Updated on March 21, 2024
31th is incorrect. The correct ordinal representation for thirty-one is 31st, indicating a position following the 30th.
31th vs. 31st — Which is Correct Spelling?

Which is correct: 31th or 31st

How to spell 31st?


Incorrect Spelling


Correct Spelling

Key Differences

Think of "first" when you consider 31; it clearly starts with "fir" (as in "first").
Remember that the sound of the number "thirty-one" ends in the sound “-one,” matching "st" and not “-th.”
Note that “30th” ends with “th” while “31st” changes to “st.”
Visualize "31st" on calendars or lists to imprint the correct spelling.
Numbers ending in 1, regardless of the tens place, take the suffix "st" (like 1st, 21st, 31st).

How Do You Spell 31st Correctly?

Incorrect: The meeting is scheduled for December 31th.
Correct: The meeting is scheduled for December 31st.
Incorrect: The document was signed on January 31th.
Correct: The document was signed on January 31st.
Incorrect: Today is March 31th.
Correct: Today is March 31st.
Incorrect: He is celebrating his 31th birthday.
Correct: He is celebrating his 31st birthday.
Incorrect: She finished in the 31th place in the race.
Correct: She finished in the 31st place in the race.

31st Definitions

Indicates a day of a month.
Halloween is on the 31st.
Represents a specific position in a sequence.
She finished 31st in the marathon.
The ordinal number following the 30th.
The event is on the 31st of October.
Specifies an item in an ordered list.
Point number 31st covers additional details.
Used to denote a specific ranking.
The team was 31st nationally.
Abbreviation of thirty-first
Coming next after the thirtieth in position

31st Meaning in a Sentence

The deadline for submissions is October 31st.
The special offer expires on January 31st.
The company's fiscal year ends on March 31st.
He moved to New York on March 31st.
The exhibit is open until June 31st.
He will retire on July 31st after 25 years of service.
The festival starts on August 31st and ends on September 5th.
Her wedding is planned for May 31st.
The competition's final round will be held on July 31st.
I have an appointment with the dentist on April 31st.
The library will be closed for renovations starting September 31st.
The club's annual general meeting is scheduled for October 31st.
She is due to give birth around June 31st.
The lease agreement begins on December 31st.
They are throwing a big party on October 31st for Halloween.
The construction is expected to be completed by May 31st.
Their anniversary falls on December 31st, New Year's Eve.
My return flight is booked for August 31st.
We need to vacate the apartment by November 31st.
The marathon takes place on September 31st every year.
The project's launch date is set for March 31st.
He received the award on September 31st.
The school's summer term ends on July 31st.
The scholarship application deadline is January 31st.

31st Idioms & Phrases

Until the 31st

Indicates that something will continue up to and including the last day of months that have 31 days.
The exhibition is open until the 31st.

31st edition

The thirty-first version or release of a publication or product.
This is the 31st edition of the annual guide.

On the 31st

Referring to something happening on the last day of months that have 31 days.
We're planning a trip on the 31st.

By the 31st

Something needs to be done or completed before or on the last day of months that have 31 days.
The report must be submitted by the 31st.

31st of the month

Refers specifically to the last day of months that contain thirty-one days.
Payments are due on the 31st of the month.

31st in line

Being the thirty-first person or item in a sequence or order.
He was the 31st in line for tickets.

Celebrate on the 31st

To observe or commemorate an event on the last day of months that have 31 days.
We always celebrate on the 31st with a family dinner.

31st anniversary

Celebrating the thirty-first year of an event or establishment.
The company is celebrating its 31st anniversary.

31st floor

The level or story of a building that is numbered thirty-one.
The office is located on the 31st floor.

31st birthday

The celebration of turning thirty-one years old.
She's excited for her 31st birthday.

Common Curiosities

Why is it called 31st?

It's called 31st because it represents the ordinal position following the 30th.

What is the singular form of 31st?

31st is already in its singular form.

What is the pronunciation of 31st?

It's pronounced "thirty-first."

Which article is used with 31st?

Both "the" and "a" can be used with 31st, depending on the context.

Is 31st a negative or positive word?

It's neutral; neither negative nor positive.

What is the verb form of 31st?

31st doesn't have a verb form; it's an ordinal number.

What is the root word of 31st?

The root word is "thirty-one."

Which vowel is used before 31st?

Typically, "a" is used as in "a 31st."

What is the plural form of 31st?

Ordinal numbers like 31st don't have a standard plural form.

Which preposition is used with 31st?

For dates or positions, "on" can be used, as in "on the 31st."

Is 31st a vowel or consonant?

31st is an ordinal number and doesn't fit into vowel or consonant categories.

Which conjunction is used with 31st?

Any conjunction can be used with "31st" based on the sentence structure; there isn't a specific one.

Is 31st a noun or adjective?

31st can function as both a noun (e.g., "the 31st of the month") and an adjective (e.g., "the 31st contestant").

Is the word “31st” a Direct object or an Indirect object?

It can serve as either, depending on the sentence structure.

How do we divide 31st into syllables?

31st is divided as thir-ty-first.

What is the stressed syllable in 31st?

The first syllable, "thir," is stressed.

What is another term for 31st?

There isn't a specific synonymous term for the ordinal number 31st.

What is the opposite of 31st?

There isn't a direct opposite, but in a sequence, the first would be farthest from the 31st.

How is 31st used in a sentence?

"The party is scheduled for the 31st of December."

How many syllables are in 31st?

There are three syllables in 31st: thir-ty-first.

What part of speech is 31st?

It can be an adjective or a noun, depending on its use.

Which determiner is used with 31st?

Common determiners include "the" or "a."

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Author Spotlight

Written by
Tayyaba Rehman
Tayyaba Rehman is a distinguished writer, currently serving as a primary contributor to As a researcher in semantics and etymology, Tayyaba's passion for the complexity of languages and their distinctions has found a perfect home on the platform. Tayyaba delves into the intricacies of language, distinguishing between commonly confused words and phrases, thereby providing clarity for readers worldwide.

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