Trimester or Trimestre may refer to: *

Academic term An academic term (or simply term) is a portion of an academic year during which an educational institution holds Class (education), classes. The school timetable, schedules adopted vary widely. Common terms such as semester, trimester, and quarte ...

, a trimester system divides the academic year into three terms *

Trimester (pregnancy) Pregnancy is the time during which one or more offspring gestates inside a woman's uterus. A multiple pregnancy involves more than one offspring, such as with twins. Conception usually occurs following vaginal intercourse, but can also ...

in humans, where the time of pregnancy is divided into three terms of 13 weeks to refer to the fetus's development * A period of three

month A month is a unit of time, used with calendars, that is approximately as long as a natural phase cycle of the Moon; the words ''month'' and ''Moon'' are cognates. The traditional concept of months arose with the cycle of Moon phases; such lunar mo ...

s (''Latin tri +mensis=month or moon)'' In Europe, where

financial year A fiscal year (also known as a financial year, or sometimes budget year) is used in government accounting, which varies between countries, and for budget purposes. It is also used for financial reporting by businesses and other organizations. La ...

s start on 1 January each year, often Jan+Feb+Mar etc.

See also