Half Day or Half-Day? Which is Correct?

Ever found yourself writing an email or a report and got stuck deciding between ‘half day’ or ‘half-day’? Actually, both are correct, but they’re used differently.

Consider ‘half day’ (without the hyphen) as a noun. It refers to when you work or go to school for only part of the day.

But ‘half-day’ (with the hyphen) is an adjective that describes something else that only lasts for half the usual time. For example, a ‘half-day meeting’.

Half Day or Half-Day? Which is Correct?

Both ‘half day’ and ‘half-day’ are correct, but they’re used in different situations.

“Half day” without a hyphen is a noun that means a day is only a part of the usual working hours. When you add a hyphen to make “half-day,” it turns into an adjective that describes something that lasts for half a day.

Examples of Each

  • As a Noun (No Hyphen):
    • You might take a half day off from work to attend a personal event.
  • As an Adjective (With Hyphen):
    • Your company might offer a half-day training session for new employees.

Half Day: Meaning and Usage

“Half day” simply means a time span that is about half of a regular workday. It’s a term often used when talking about your work hours, a training session, or clinic timings. It might refer to either the morning or afternoon part of a workday.

As a noun, ‘half day’ denotes a period of time rather than describing a feature of another noun. How you understand its meaning often depends on the situation in which it’s used.

Without the hyphen, you might say:

  • “I have a half day on Friday to complete the care assessment.”

Remember, ‘half day’ is a noun. Recognizing this can help you build your sentences correctly and make what you’re saying clearer.

Half-Day: Meaning and Usage

The term ‘half-day’, when used with a hyphen, works as an adjective in English. It’s used to explain that something else only lasts for half of the usual time. It’s not about a specific time period itself.

This is where the hyphen plays an important role. It transforms ‘half day’ from a noun to an adjective that modifies another noun.

For example:

“It was a half-day meeting”, 

Here, the phrase ‘half-day’ describes the noun ‘meeting’, indicating it will only last for half the usual workday.

Examples of Using Half Day in A Sentence

“I’m taking a half day off tomorrow to visit the doctor.”

“The school has declared a half day for students due to the sports event.”

“He took a half day to attend his son’s graduation ceremony.”

“Our company provides a half day on Fridays for work-life balance.”

“She decided to take a half day to finish her project at home.”

Examples of Using Half-Day in A Sentence

“We have a half-day workshop scheduled for new recruits.”

“I attended a half-day seminar on digital marketing.”

“The half-day training session was very informative.”

“The company arranged a half-day team building activity for its employees.”

“The school is organizing a half-day field trip for the students.”

Frequently Asked Questions

What is the plural of half-day?

The plural of “half-day” is “half-days” when referring to multiple days consisting of a half day schedule. For example, you might say, “The conference has two half-days of workshops.”

How should ‘half day’ be hyphenated in formal writing?

In formal writing, “half day” should be hyphenated to “half-day” when used as an adjective before a noun, such as “half-day meeting.” When used as a noun, it is typically written without a hyphen even in formal contexts.

What are the typical starting or ending times associated with a half day?

A half day often refers to either the first or second half of the workday. This generally translates to a starting time of the morning, often 8 or 9 AM, and an ending time around 12 or 1 PM for morning half-days, or starting early afternoon and ending at the close of business hours for afternoon half-days.

About the author

 Chris Edwards is an English Language Coach with over 10 years of experience in teaching and mentoring students in English grammar and the correct usage of English words. He has a degree in English Literature and Linguistics, and has a certification in Teaching English to Speakers of Other Languages (CELTA)