New Year's Eve

:  having recently come into existence :  recent, modern

:  having been seen, used, or known for a short time :  novel

:  unfamiliar

:  newly, recently

:  the period of about 365¹/₄ solar days required for one revolution of the earth around the sun

:  the time required for the apparent sun to return to an arbitrary fixed or moving reference point in the sky

:  the time in which a planet completes a revolution about the sun

:  evening

:  the evening or the day before a special day

:  the period immediately preceding