java.time · java.base · since Java 1.8

Period

declaration

public final class Period implements ChronoPeriod, Serializable

A calendar-unit span (years, months, days): "3 months" regardless of their length. Duration measures exact time; Period measures human calendar distance.

Key methods

`static Period between(LocalDate start, LocalDate end)`	Calendar distance (y/m/d components).
`static Period ofMonths(int) / ofYears(int)`	Creation.