trimestri

Trimestri is the plural form of trimestre in Italian, used to denote one of the three-month intervals into which a year or another time span is divided. The term is applied across different contexts to indicate a three-month period.

In the calendar sense, a year is commonly divided into four trimestri: primo trimestre (January through March), secondo trimestre (April through June), terzo trimestre (July through September) and quarto trimestre (October through December). Some contexts may adjust the exact month boundaries to fit fiscal, academic, or organizational calendars.

In business and administration, trimestre refers to a three-month reporting period. Companies often publish bilanci trimestrali or risultati trimestrali to convey quarterly performance. Fiscal calendars may place quarters differently from the standard calendar year, depending on country and company policy.

In education, certain systems structure the academic year into three trimesters, each followed by assessments and progress reports. The term is also used in medicine to describe pregnancy trimesters, such as primo trimestre di gravidanza, secondo trimestre and terzo trimestre.

Etymologically, trimestri derives from Latin trimestres, combining tri- (three) and mens (months). In Italian, the related term quadrimestre refers to a four-month period, and is used in some contexts as an alternative time division.