A wish said around the start of a new year to wish someone well for the New Year (holiday) or for the (entire) new year.

the millennium bug

(idiomatic) Absolutely not.

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

A series of conflicts between France and England, lasting 116 years from 1337 to 1453.

An annual Chinese holiday, marking the beginning of a new year according to the traditional Chinese calendar.

plural of year 2000 problem

plural of Chinese New Year

A storm of such force that it occurs only once every one hundred years approximately.

plural of hundred-year storm