plural of year to date

An informal competition among birdwatchers to determine who can see or hear the largest number of species of birds within a single calendar year and within a specific geographical area.

The holiday commemorating (the beginning of) the new year.

(astronomy) Great Year; one complete precession of the equinoxes, approximately 25,765 years.

Synonym of twilight years

In the Jewish calendar, a year of 355 days or a leap year of 385 days; perfect year.

plural of abundant year

The period of time equal to half a year; normally referred to as 6 months, but a half-year is more exactly 182.5 days (without a leap day)

plural of turn of the year.

(idiomatic, euphemistic) Old age; especially, the leisure years in later life after one has retired from employment. / (idiomatic) The period during which someone or something flourishes.