22th or 22nd: Which Is Correct? Spelling, Grammar Rules, and Examples Explained (2026)

You are writing an invitation, a caption, or a date on a form. You type “22” and stop. Does it get a “th” like 4th and 5th, or something else? A lot of people freeze at this exact spot.

The good news is that the answer is quick and the rule behind it is easy. Once you understand it, you will never second-guess 22nd, 32nd, or 102nd again.

This guide covers the correct spelling, the grammar rule, dates, birthdays, monthsary messages, and a full list of ordinals from 1st to 30th. You will also get a simple memory trick that makes the rule stick.

22th or 22nd – Quick Answer

The correct form is 22nd. “22th” is a spelling mistake.

The ordinal suffix depends on the last digit. Because 22 ends in 2, it takes “nd,” just like second (2nd).

Use 22nd in dates, rankings, anniversaries, floors, and anywhere else you need the ordinal for twenty-two.

22th or 22nd Monthsary

“Monthsary” is a playful, informal word that blends month and anniversary. Couples use it to mark each month they have been together. It is especially popular in the Philippines and parts of Southeast Asia, and it is common in social media captions.

The correct way to write it is 22nd monthsary.

You may see it used in two ways:

1. The 22nd month together: Happy 22nd monthsary, my love.
2. The 22nd day of the month: If a couple started dating on the 22nd, they might celebrate every month on that date.

Example captions:

• Happy 22nd monthsary to us! Here’s to many more months together.
• Twenty-two months and still counting. Happy 22nd monthsary!
• Today is our 22nd monthsary, and I love you more every day.

Note that “monthsary” is informal and not found in many standard dictionaries. It suits personal messages, not formal writing. For formal contexts, write “22-month anniversary.”

The Origin of 22th or 22nd

To see why the suffix is “nd,” look at how the abbreviation was born.

Ordinal abbreviations come from the last two letters of the written word:

• first → st
• second → nd
• third → rd
• fourth → th

When we write 22nd, we are shortening twenty-second. The end of that word is “-nd,” so the abbreviation keeps “nd.”

The mistake “22th” often happens because most ordinals do end in “-th.” English teaches us that pattern early with fourth, fifth, sixth, seventh, and so on. So writers apply the general rule to numbers that actually need the exception.

Some other sources note that these forms are simply a shortened spelling of the full ordinal word. That idea matches how English has treated abbreviations for centuries: keep the first digits and the last letters of the word.

British English vs American English Spelling

Here is something reassuring. The suffix for 22 is the same in British and American English. Both write 22nd.

What does change between the two varieties is the date order and wording.

A few quick notes:

• In the United States, many style guides prefer “April 22” without the suffix in formal writing, though “April 22nd” is also common in everyday use.
• In the United Kingdom, “22 April” is the standard in formal writing, and “22nd April” is also familiar.
• The spoken form can include “the” and “of” in either variety: the 22nd of April.

So the spelling debate never changes by country. Only the date layout does.

Which Spelling Should You Use?

Always use 22nd.

There is no region, style guide, or context where “22th” is the accepted form. Style guides and dictionaries all follow the same rule for the last digit.

The only real choice you have is between three formats:

1. Numerals with a suffix: 22nd
2. Spelled out in words: twenty-second
3. Superscript: 22^nd

Which should you pick?

Many style guides suggest spelling out ordinals below ten and using numerals for larger ones, which makes 22nd a natural fit for numerals.

Why Is 22nd Correct Instead of 22th?

Three simple reasons explain it.

Reason 1: The Last Digit Controls the Suffix

For numbers above 20, English checks only the final digit:

• Ends in 1 → st (21st, 31st, 101st)
• Ends in 2 → nd (22nd, 32nd, 102nd)
• Ends in 3 → rd (23rd, 33rd, 103rd)
• Everything else → th

Twenty-two ends in 2, so it becomes 22nd.

Reason 2: The Spoken Word Ends in “-nd”

We say twenty-second, not twenty-twoth. The word ends in the same sound as second, so the abbreviation does too.

Reason 3: The “th” Rule Is for Different Numbers

The “th” ending is for numbers ending in 4 through 9 and 0, plus the special teens: 11th, 12th, and 13th. The number 22 does not belong to either group.

Common Mistakes with 22th or 22nd

Here are the slip-ups that show up most often.

Mistake 1: Writing 22th

• ❌ My brother’s 22th birthday is next week.
• ✅ My brother’s 22nd birthday is next week.

Mistake 2: Writing 22sd

• ❌ The 22sd floor has a great view.
• ✅ The 22nd floor has a great view.

Mistake 3: Writing 22rd

• ❌ She finished 22rd in the race.
• ✅ She finished 22nd in the race.

Mistake 4: Forgetting the teens exception

• ❌ 12nd, 13rd, 11st
• ✅ 12th, 13th, 11th

The teens are special because they follow the “th” pattern even though they end in 1, 2, or 3.

Mistake 5: Using the wrong suffix on bigger numbers

• ❌ 112nd
• ✅ 112th (the last two digits are 12, a teen)

Mistake 6: Mixing cardinal and ordinal numbers

• ❌ I live on the floor 22.
• ✅ I live on the 22nd floor.

Mistake 7: Skipping the suffix in formal text In formal writing, “the 22 of April” can look unfinished. Add the suffix or reorder the date: “April 22” or “the 22nd of April.”

Easy Rule for Ordinal Numbers

Here is the whole system in a few lines.

1. Start with the last digit.
2. 1 → st, 2 → nd, 3 → rd.
3. Everything else → th.
4. Exception: if the last two digits are 11, 12, or 13, use th.

Quick Rule Table

22th or 22nd April

April dates are very common in documents, invitations, and reports.

Correct forms:

• April 22nd
• April 22
• 22nd April
• 22 April
• The 22nd of April

Incorrect:

• ❌ April 22th
• ❌ 22th April

Example Sentences

• The workshop begins on the 22nd of April.
• Please submit your forms by April 22nd.
• Earth Day is celebrated on April 22, and many schools plan events around the 22nd.

If you write a date in a formal letter, “22 April 2026” is clean, short, and correct.

22th or 22nd in Everyday Examples

Seeing 22nd in real situations makes it feel natural.

In dates

• Her wedding is on the 22nd.
• The meeting has moved to the 22nd of the month.

In birthdays and anniversaries

• Today is his 22nd birthday.
• We are celebrating our 22nd anniversary.

In rankings and competitions

• He finished 22nd in the marathon.
• Our team is in 22nd place.

In buildings and addresses

• The office is on the 22nd floor.
• They live on 22nd Street.

In history and series

• This is the 22nd edition of the festival.
• The 22nd Amendment limits presidential terms in the United States.

In everyday chat

• “Is it the 22nd already?”
• “I’m picking you up on the 22nd.”

22th or 22nd August

August works the same way.

Correct forms:

• August 22nd
• August 22
• 22nd August
• 22 August
• The 22nd of August

Incorrect:

• ❌ August 22th
• ❌ 22th of August

Example Sentences

• Registration closes on August 22nd.
• The flight departs on the 22nd of August at dawn.
• Our summer trip starts on 22 August.

Months do not change the suffix rule. Whether it is April, August, or December, the 22nd is always the 22nd.

22th or 22nd – Google Trends & Usage Data

I cannot read live Google Trends data inside this article, so I will not make up figures. Here is what can be said honestly.

What is reasonable to expect:

• Searches for “22th or 22nd” tend to rise around the 22nd of a month, birthdays, and anniversaries.
• Many searchers are checking a quick spelling, so interest is often short and practical.
• Mixed-up forms like “22th” are common enough that search engines suggest the correct form.

How you can check the data yourself:

1. Open Google Trends.
2. Enter “22nd” and “22th” as comparison terms.
3. Choose your country and time range.
4. Check the “related queries” panel to see what people ask alongside it, such as dates, birthdays, or monthsary messages.

This takes about a minute and gives you real numbers for your own audience.

Is it 22nd of September or 22th of September?

It is 22nd of September.

The month does not change the rule. The suffix is decided by the number 22, not by the month name.

Correct forms:

• September 22nd
• September 22
• 22nd September
• 22 September
• The 22nd of September

Example sentences:

• The autumn equinox often falls around September 22nd or 23rd.
• Our school reopens on the 22nd of September.
• She was born on 22 September.

Remember that “September” is spelled out in full in formal writing, while “Sept.” appears in short notes and calendars.

What Are the Rules for Adding Suffixes to Numbers?

Ordinal numbers show position or order in a sequence. They are used for dates, rankings, floors, centuries, and many other things.

Here are the main rules.

Rule 1: Add “th” to Most Numbers

Add th to numbers ending in 0 or 4 through 9.

• 4th, 5th, 10th, 17th, 20th, 100th

Rule 2: Use st, nd, rd for 1, 2, and 3

• 1st, 2nd, 3rd

Rule 3: Apply the Same Rule to Larger Numbers

• 21st, 22nd, 23rd
• 31st, 32nd, 33rd
• 101st, 102nd, 103rd

Rule 4: Treat 11, 12, and 13 as Exceptions

• 11th, 12th, 13th
• 111th, 112th, 113th

Rule 5: Change Some Spellings in Words

When writing ordinals as words, a few forms change in the spelling:

• five → fifth
• eight → eighth
• nine → ninth
• twelve → twelfth
• twenty → twentieth

Rule 6: Hyphenate Compound Words

• twenty-first
• twenty-second
• thirty-third

Comparison Table: 22th vs 22nd

How to Wish a 22nd Birthday?

Also Read This:13th vs. 13rd: Which Spelling Is Correct? Meaning and Examples

A 22nd birthday often means a milestone. Many people are finishing school, starting careers, or planning their next steps. Warm, simple messages work best.

Short and Sweet

• Happy 22nd birthday! Enjoy every moment.
• Cheers to 22 years of you. Have a wonderful day!
• Happy 22nd! May this year bring you joy and growth.

For Friends

• Happy 22nd birthday to someone who makes life brighter. Let’s celebrate big!
• Twenty-two looks great on you. Happy birthday!
• Here’s to your 22nd year. May it be your best one yet.

For Family

• Happy 22nd birthday! I am so proud of the person you have become.
• Wishing you a 22nd birthday filled with love, laughter, and good surprises.

For a Partner

• Happy 22nd birthday to the one who makes every day better.
• You make 22 look amazing. I love celebrating you.

For Social Media Captions

• 22 and loving it. Thank you for all the birthday wishes!
• Level 22 unlocked.
• My 22nd birthday was one for the books.

Always write “22nd birthday,” not “22th birthday.” A card or caption with the correct suffix looks thoughtful and polished.

Ordinal Numbers Similar to 22nd

Numbers ending in 2 follow the same pattern. Once you know one, you know them all.

Neighbors of 22nd

• 21st: twenty-first
• 23rd: twenty-third
• 24th: twenty-fourth

The One Big Exception

• 12th, not 12nd (twelfth)
• 112th, not 112nd (one hundred and twelfth)

Ordinal Numbers from 1st to 30th

Keep this list handy for dates and rankings.

Memory Trick to Remember 22nd

Try one of these.

Trick 1: Two Twos Make “nd”

The number 22 has two 2s, and 2 gets nd. Say it in your head: “Two, two, so nd too.”

Trick 2: Say the Word, Then Shorten It

Say twenty-second out loud. Take the last two letters of the word: nd. Attach them to 22.

Trick 3: The Last Digit Boss

Picture the last digit as the boss. The boss decides the suffix.

• 1 → st
• 2 → nd
• 3 → rd

The only time the boss loses power is with the teens.

Trick 4: The Teen Alert

Whenever you see 11, 12, or 13 at the end, shout “th!” Those three are the rebels.

Trick 5: Practice with Your Own Dates

Write your birthday, your next appointment, and the date today. Check each one with the last-digit rule. A few rounds usually fix the habit.

Quick Test

Fill in the blank with st, nd, rd, or th.

1. 22__
2. 23__
3. 31__
4. 112__
5. 52__

Answers: 1. nd. 2. rd. 3. st. 4. th. 5. nd.

Conclusion

The correct form is 22nd, and 22th is a common spelling slip. The suffix follows the last digit, and since 22 ends in 2, it takes “nd,” just like second. The same rule works for dates, birthdays, rankings, and monthsary messages, in both British and American English.

When in doubt, check the last digit, remember that 11, 12, and 13 are the only exceptions, and say the full word out loud if you need a hint. With the memory tricks above, you can write any ordinal number with confidence.