The twelve months comprises 12 months, varying in total based on the typical or Gregorian schedule. In re Parker's Estate, 14 Wkly. Notes Cas. (Pa.) 506. 2. a listing or systematic enumeration of factors or movements organized for trial or hearing in a court.
Twelve-month duration starting with January 1 and closing with December 31, and with 365 days in non leap many years and 366 days in a leap year. Also called municipal 12 months.
the entire year (reckoned from January 1 to December 31) according to Gregorian diary
The British figures are from the Board of Trade returns for the calendar year 1908.