A week long (week-long) vacation

A tiny hyphen can change meaning and clarity. Use week-long (with a hyphen) when the phrase works together as a compound adjective before a noun: a week-long retreat. Drop the hyphen when the phrase follows the noun: The retreat was week long.

Below: a short rule, common exceptions, many ready-to-copy examples for work, school, and casual writing, quick rewrite patterns, and a one-line memory trick to make the choice automatic.

Quick answer

Hyphenate when two or more words act together as a single adjective before a noun: a week-long vacation. Do not hyphenate when the phrase follows the noun (predicate) or when the first word is an -ly adverb.

• Before a noun = hyphen: a week-long meeting; a three-day workshop.
• After a noun (predicate) = no hyphen: The meeting was week long.
• No hyphen with adverbs ending in -ly: a newly hired assistant.

Core rule and common exceptions

When two or more words combine to modify a noun as a single idea, join them with a hyphen. This keeps meaning clear and prevents misreading.

• Compound adjective before a noun: hyphenate (week-long trial, well-known fact).
• Predicate position: usually omit the hyphen (The trial was week long; The fact is well known).
• -ly adverbs: do not hyphenate (a highly rated speaker, an easily solvable problem).
• Numbers and units: hyphenate when used adjectivally before a noun (a 10-week program, a five-page paper).

Hyphenation and spacing notes

Spacing errors often come from typing fast or copying spoken phrasing. Check whether the words form a single descriptor before the noun; that determines hyphenation.

• If removal of the hyphen makes the meaning ambiguous, add the hyphen.
• If the phrase follows the noun and reads naturally without a hyphen, leave it open.
• When in doubt, rewrite: a cleaner sentence usually avoids hyphen confusion.

Real usage: work, school, and casual examples

Seeing the pattern across contexts trains your eye faster than rules alone. Below are natural examples you can copy.

• Work
  • Wrong: We scheduled a week long sprint to finish the feature.
  • Right: We scheduled a week-long sprint to finish the feature.
  • Right (predicate): The sprint was week long because we cut scope.
• School
  • Wrong: Submit a ten page report by Monday.
  • Right: Submit a ten-page report by Monday.
  • Right (predicate): The report is ten pages long.
• Casual
  • Wrong: We planned a weekend long hike.
  • Right: We planned a weekend-long hike.
  • Right (predicate): The hike ended up weekend long because of traffic.

Wrong vs right pairs you can copy

These short pairs make the correction obvious and help you spot similar mistakes in your drafts.

• Wrong: I took a week long vacation.
  Right: I took a week-long vacation.
• Wrong: She signed a month to month lease.
  Right: She signed a month-to-month lease.
• Wrong: We ran a three day workshop.
  Right: We ran a three-day workshop.
• Wrong: The course is twelve weeks long. Right (before noun): a twelve-week course.
• Wrong: They are newly hired staff.
  Right: They are newly hired staff. (No hyphen; -ly rule)
• Wrong: Is it a year long commitment?
  Right: Is it a year-long commitment?

How to fix your own sentence (quick rewrite patterns)

Fixing hyphen errors is often faster than you think. Test the full sentence, then apply one of these simple patterns.

• Pattern A - Before-noun fix: [word + word] + noun → [word-word] noun.
  • Example: week long vacation → week-long vacation.
• Pattern B - Predicate position: noun + verb + [phrase] → leave open.
  • Example: The vacation was week long.
• Pattern C - Rewrite for clarity: replace the compound with an alternate phrasing.
  • Example: Instead of "a week-long meeting," write "a meeting that lasts a week."

Three quick rewrites you can paste:

• Original: This plan is week long if everyone stays late.
  Rewrite: This plan lasts a week if everyone stays late.
• Original: The assignment seems three days long now.
  Rewrite: The assignment will take three days.
• Original: Is that month to month?
  Rewrite: Is that a month-to-month arrangement?

A one-line memory trick

Before the noun? Hyphenate. After the noun? Leave it open. If the first word ends in -ly, leave it open. Repeat that sentence once, and the choice becomes automatic.

• Think: "Before-noun = bond the words with a hyphen."
• When unsure, rewrite instead of guessing.

Similar mistakes to watch for

When one spacing or hyphen error slips in, related mistakes often appear nearby. Scan for these patterns:

• Split compounds that should be hyphenated (month-to-month, long-term).
• Unnecessary hyphens with -ly adverbs (highly-rated → highly rated).
• Numbers and units used adjectivally without hyphens (10-week, five-page).
• Mixed styles within the same document - pick one consistent approach.

FAQ

Do I always hyphenate week-long?

Hyphenate week-long when it modifies a noun before that noun (a week-long retreat). Omit the hyphen when it follows the noun (The retreat was week long).

Is month-to-month hyphenated?

Yes before a noun: a month-to-month lease. In predicate position you can write: The lease is month to month.

Should numerals be hyphenated with units (10-week or 10 week)?

Yes. Hyphenate numerals and spelled-out numbers used adjectivally before a noun: a 10-week program, a five-page paper.

What about newly hired - should it be newly-hired?

No. Adverbs ending in -ly do not take hyphens with the adjective: a newly hired assistant (no hyphen).

How can I check sentences quickly for missing hyphens?

Use the before-noun test and the -ly test. For longer documents, run a grammar checker to flag likely missing hyphens and offer one-click rewrites.

Want a quick, automated check?

When you need speed, paste a sentence or a paragraph into a grammar tool to highlight missing hyphens and suggest fixes. Combine that with the one-line before-noun test for a fast human check.