Calendar-year

See under year (def 1).
a period of 365 or 366 days, in the Gregorian calendar, divided into 12 calendar months, now reckoned as beginning Jan. 1 and ending Dec. 31 (calendar year or civil year)
Compare common year, leap year.
a period of approximately the same length in other calendars.
a space of 12 calendar months calculated from any point:
This should have been finished a year ago.
Astronomy.

Also called lunar year. a division of time equal to 12 lunar months.
Also called astronomical year, equinoctial year, solar year, tropical year. a division of time equal to about 365 days, 5 hours, 48 minutes, and 46 seconds, representing the interval between one vernal equinox and the next.
Also called sidereal year. a division of time equal to the equinoctial year plus 20 minutes, representing the time required for the earth to complete one revolution around the sun, measured with relation to the fixed stars.
Compare anomalistic year.

the time in which any planet completes a revolution round the sun:
the Martian year.
a full round of the seasons.
a period out of every 12 months, devoted to a certain pursuit, activity, or the like:
the academic year.
years.

age.
old age:
a man of years.
time; period:
the years of hardship and frustration.
an unusually long period of time of indefinite length:
I haven’t spoken to them in years.

a group of students entering school or college, graduating, or expecting to graduate in the same year; class.
a year and a day, a period specified as the limit of time in various legal matters, as in determining a right or a liability, to allow for a full year by any way of counting.
from the year one, for a very long time; as long as anyone remembers:
He’s been with the company from the year one.
year in and year out, regularly through the years; continually:
Year in and year out they went to Florida for the winter.
Also, year in, year out.
noun
Also called civil year. the period of time, the calendar year, containing 365 days or in a leap year 366 days. It is based on the Gregorian calendar, being divided into 12 calendar months, and is reckoned from January 1 to December 31
a period of twelve months from any specified date, such as one based on the four seasons
a specific period of time, usually occupying a definite part or parts of a twelve-month period, used for some particular activity: a school year
Also called astronomical year, tropical year. the period of time, the solar year, during which the earth makes one revolution around the sun, measured between two successive vernal equinoxes: equal to 365.242 19 days
the period of time, the sidereal year, during which the earth makes one revolution around the sun, measured between two successive conjunctions of a particular distant star: equal to 365.256 36 days
the period of time, the lunar year, containing 12 lunar months and equal to 354.3671 days
the period of time taken by a specified planet to complete one revolution around the sun: the Martian year
(pl) age, esp old age: a man of his years should be more careful
(pl) time: in years to come
a group of pupils or students, who are taught or study together, divided into classes at school: they are the best year we’ve ever had for history
(informal) the year dot, as long ago as can be remembered
(English law) year and a day, a period fixed by law to ensure the completion of a full year. It is applied for certain purposes, such as to determine the time within which wrecks must be claimed
year in, year out, regularly or monotonously, over a long period
noun
See year (sense 1)
n.

In addition to the idiom beginning with
year