A month is a unit of time, roughly one-twelfth of a year, used in calendars to organize days. Many months have 30 or 31 days, except February, which usually has 28.
From Old English “monaþ,” related to “mōna,” meaning “moon.” Months were originally based on cycles of the Moon’s phases.
The word month is basically ‘moon-th’—a slice of time carved from the Moon’s cycle. Even in our mostly solar calendar, the ghost of the lunar rhythm is built into how we talk about time.
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