You’ve probably typed “mondays or monday’s” into Google because something felt off. Maybe you wrote “on Monday’s” and hesitated. Or you saw both forms online and weren’t sure which one is correct. The confusion comes down to one small detail: the apostrophe.
It looks minor, but it changes meaning completely. One form talks about repetition, the other shows ownership. This is why people often mix them up in emails, schedules, and everyday writing.
This guide gives you a clear answer, shows when each form works, and helps you avoid the common mistakes that make writing look incorrect.
Mondays Or Monday’s: Quick Answer
- “Mondays” is correct when you mean more than one Monday or a repeated action.
- “Monday’s” is correct when something belongs to Monday.
Examples:
- I work from home on Mondays.
- Monday’s meeting starts at 10 AM.
Mondays Or Monday’s Grammar: Why People Keep Mixing Them Up
The confusion happens because both words sound exactly the same when spoken. There is no difference in pronunciation, so the mistake only shows up in writing.
Another reason is a common myth: people think adding an apostrophe makes a word plural. That is incorrect. Apostrophes do not create plurals. They only show possession.
Also, phrases like “Monday’s meeting” are very common. Because of this, many people start assuming the apostrophe is always needed with days, even when it is not.
When You Should Use “Mondays” (Plural Form)
Use “Mondays” when you are talking about something that happens regularly or repeatedly.
Common patterns:
- On Mondays
- Every Mondays (informal, but used in some regions)
- Mondays are busy
Examples:
- I go to the gym on Mondays.
- Mondays feel longer than other days.
- We have team calls on Mondays.
Key idea:
If you can replace it with “every Monday”, then “Mondays” is correct.
When “Monday’s” Is Actually Correct
Use “Monday’s” when something belongs to Monday or is associated with it.
This is called possessive form.
Examples:
- Monday’s meeting was canceled.
- I didn’t finish Monday’s work.
- Monday’s weather looks clear.
Quick test:
If you can rephrase the sentence as “the meeting of Monday”, then “Monday’s” is correct.
Mondays Or Monday’s: A Simple Trick To Never Get It Wrong
Use this quick check:
| Situation | Correct Form |
| Talking about routine | Mondays |
| Talking about ownership | Monday’s |
Try this mental test:
- Can you add “every”? → Use Mondays
- Can you add “of Monday”? → Use Monday’s
Examples:
- Every Monday → Mondays
- Meeting of Monday → Monday’s meeting
This works in almost every situation.
Common Mondays Or Monday’s Mistakes And How To Fix Them
Here are mistakes people often make:
- ❌ On Monday’s I go to work
✔ On Mondays I go to work - ❌ Mondays meeting is at 9
✔ Monday’s meeting is at 9 - ❌ I hate Monday’s
✔ I hate Mondays - ❌ Mondays’s schedule is full
✔ Monday’s schedule is full
These errors usually happen when people confuse repetition with possession.
The Right Way To Use Mondays Or Monday’s
Here is the final clarity:
- Mondays = plural (routine, repeated days)
- Monday’s = possessive (something linked to Monday)
If you remember just one thing:
Plural = no apostrophe
Possessive = apostrophe
What People Still Get Wrong About Mondays Or Monday’s
Can “Monday’s” Ever Be Plural?
No. “Monday’s” is never plural. It only shows possession.
Why Apostrophes Don’t Make Words Plural
Apostrophes are for:
- possession
- contractions
They are not used for plural forms like Mondays, books, or cars.
Is “Mondays Meeting” Ever Correct?
No. It should be:
- Monday’s meeting
Because the meeting belongs to Monday.
Should You Use It In Formal Writing?
Yes, but correctly:
- Use Mondays for routines
- Use Monday’s for possession
Incorrect apostrophe use looks unprofessional, especially in emails and business writing.
