What does month mean?
A month is a division of the year, either one of the twelve named periods—such as January, April, or December—or a loosely defined span lasting about four weeks. Calendar months vary in length from 28 to 31 days, with February usually having 28 days and gaining an extra day in leap years. The word is also used for an allotted or approximate period: a contract may run for a month, while a medicine may be taken twice a month. In dates, expressions such as “on the fifth of June” and “in the month of June” identify a precise calendar unit, whereas “a month later” usually describes a duration without requiring an exact number of days. Historically, months were connected more closely to the moon because early calendars were based on lunar cycles. Today, month is an ordinary and indispensable unit for organizing time, recording events, describing habits, and setting schedules. Its familiar use in phrases such as “month by month” also suggests gradual, repeated change or progress over time.
nounA month is one of the twelve named divisions of the year, such as January or June. It also refers to a period of approximately four weeks, especially when discussing a duration.
- A named division of the year, such as January or June.
- A period of approximately four weeks.
- A particular time allowed, allotted, or thought of as lasting a month.
"The exhibition runs for a month, from the first of June until the end of June."
"The new policy takes effect at the beginning of next month."
"We stayed at the cabin for a month and rarely left it."
Use months when referring to multiple calendar divisions or repeated periods of roughly a month.
"The first two months of the year were unusually cold."
Month and moon are linguistic cousins: both descend from the same ancient Indo-European root associated with the lunar cycle.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does month come from?
English month comes from Old English mōnaþ, an inherited Germanic word for a division of the year. It developed from Proto-Germanic *mēnōþs, which is related to the same Indo-European root underlying moon, reflecting the older lunar basis of the calendar. Cognates include German Monat, Dutch maand, and Icelandic mánuður.
Related word forms
How month is actually used
Month is used in standard English in both formal and informal contexts. When referring to a specific calendar division, it normally follows “the,” as in “the month of March”; after a preposition, the article is commonly omitted, as in “in March.”