What Does Calendar Year Mean. A calendar year is a period of 365 or 366 days, starting on the 1st of january and ending on the 31st of december, which is used for calculating time in most parts of the world. The particular day, month, or year (usually according to the gregorian calendar) that an event occurred

Calendar year meaning, definition, what is calendar year: While a calendar year follows the standard january to december format, a “year” in different contexts might not align with these dates, such as a fiscal or academic year.