year. 1. Twelve calendar months beginning January 1 and ending December 31. — Also termed calendar year. 2. A consecutive 365-day period beginning at any point; a span of twelve months. [Cases: Time  4. C.J.S. Time § 5.] fiscal year.An accounting period of 12 consecutive months <the company’s fiscal year is

October 1 to September 30>. • A fiscal year is often different from the calendar year, esp. for tax purposes. — Also termed fiscal period.

half-year. In legal computation, a period of 182 days.

natural year.Hist. The period of 365 days and about 6 hours, or the time it takes the earth to

orbit the sun.

tax year.The period used for computing federal or state income-tax liability, usu. either the calendar year or a fiscal year of 12 months ending on the last day of a month other than December. — Also termed taxable year. [Cases: Internal Revenue  3075–3093; Taxation  1038, 1078. C.J.S.

Internal Revenue §§ 21, 41–43, 45, 51–55, 78, 334, 670; Taxation §§ 1738–1755, 1759.]
[Blacks Law 8th]