The time it takes the Earth to pass once around the Sun, as reckoned with respect to the seasons and not the fixed stars (for instance from vernal equinox to vernal equinox).

(idiomatic, Britain, Ireland) A very long time ago, from the beginning or as far back as one can remember.

A particular period in the year.

a year with an extra day, a leap year

The time that it takes for the Sun to return to the same position along the ecliptic, as viewed from the Earth, especially: / A vernal equinox year, the time between two successive vernal equinoxes.

Continuing throughout the year.

Operating or continuing throughout the year.

Being compared with those of a previous year; interannual.

A traditional greeting for Christmas and the new year.

(management, accounting) The period from the beginning of a fiscal year to the end of a reporting period.