A date of birth usually does not need an apostrophe. You should say “month of birth” instead of “months of birth” because it does not show possession.
If you are referring to a specific month’s records, you can say “this month’s birth records.” But when talking about multiple months, use “past months’ birth records.” Always check if you mean one month (month’s) or many months (months’) before using the apostrophe.
The Basics: Month vs. Months
- Month is singular, referring to one unit of time.
- Months is plural, referring to more than one unit of time.
- The confusion arises when making these words possessive.
What is Singular Possessive? (Month’s)
A singular possessive indicates that something belongs to one month. The apostrophe and “s” (‘s) show possession.
Example Scenarios:
- This month’s weather has been unpredictable. (Weather belonging to this month)
- I need to complete this month’s report. (Report related to this month)
- The month’s end is approaching quickly. (End of the month)
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Plural Possessive: What About Months’?
A plural possessive indicates that something belongs to multiple months. When plural words end in “s,” the apostrophe is placed after the “s”.
Example Scenarios:
- The last three months’ sales have been increasing. (Sales of multiple months)
- We analyzed the past six months’ trends. (Trends belonging to six months)
- Several months’ efforts paid off. (Efforts spanning multiple months)
Month’s or Months’? Singular vs. Plural Possessive
Type | Singular (Month’s) | Plural (Months’) |
Definition | Belongs to one month | Belongs to multiple months |
Example | This month’s budget is ready. | The last three months’ budgets are finalized. |
Usage | Talking about a single month | Talking about more than one month |
Avoiding Common Mistakes: Singular and Plural Possessives in Context
Many people confuse singular and plural possessives. Use month’s when talking about one month owning something, like “this month’s schedule.” Use months’ when referring to multiple months, like “three months’ progress.”
A common mistake is forgetting the apostrophe or placing it incorrectly. Saying “six months salary” is wrong; the correct form is “six months’ salary.” Always check if you mean one or multiple months before deciding where to put the apostrophe.
Singular Possessive (Month’s):
- Incorrect: This months budget is ready.
- Correct: This month’s budget is ready.
Plural Possessive (Months’):
- Incorrect: The past months performance was excellent.
- Correct: The past months’ performance was excellent.
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Singular and Plural in Everyday Context
To use correct possessive forms, always determine if you’re referring to one month or multiple months. If one month owns something, use month’s. If multiple months own something, use months’.
Example Sentences:
- This month’s goals are ambitious.
- We need to review last month’s reports.
- The last five months’ progress has been impressive.
- Over the past few months’ discussions, we reached a decision.
Possessive Forms and Time Frames
Possessive forms are often used with time expressions. Using the correct form clarifies meaning.
Example:
- “One month’s salary” means the salary earned in one month.
- “Three months’ salary” means the salary earned in three months.
Breaking Down the Use of Possessive Forms
Expression | Meaning |
A month’s delay | A delay of one month |
Two months’ notice | Notice covering two months |
This month’s plan | Plan for this single month |
Several months’ work | Work spanning multiple months |
Frequently Asked Questions
What is the difference between “month’s” and “months’?”
“Month’s” is singular possessive, while “months'” is plural possessive.
Can we use “months” without an apostrophe?
Yes, when referring to multiple months without possession, such as “six months passed.”
How do I know when to use an apostrophe?
Use an apostrophe when indicating ownership or association.
Is “months is” correct?
No, “months” is incorrect. The correct plural possessive form is “months’.”
How can I avoid confusion?
Determine if you are talking about one or multiple months before using the apostrophe.
Conclusion
Understanding “month’s” vs. “months'” is crucial for correct grammar. The singular month’s refers to one month owning something, while the plural months’ refers to multiple months owning something.
Always check whether you’re discussing a single or multiple months before choosing the correct possessive form. By following these guidelines, you can write clearly and avoid common mistakes.

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