A year of the Common Era/Christian Era; anno Domini; numbered from the once estimated first year for the birth of Jesus Christ.

(idiomatic) Absolutely not.

the millennium bug

The periodical cicada.

plural of one-year-old

Having lived or existed for one year.

A child or animal that is one year of age.

plural of New Year's Day

(Singapore) A compilation of national examination questions from past years.

The year 1816, in which severe climate abnormalities caused average global temperatures to decrease.