The Date-Time APIDesign PrinciplesA Quick ExampleEvolution of TimekeepingTime Zones and Daylight Saving TimeCalendar SystemsThe Julian CalendarThe Gregorian CalendarISO-8601 Standards for DatetimeExploring the New Date-Time APIThe ofXXX() MethodsThe from() MethodsThe withXXX() MethodsThe getXXX() MethodsThe toXXX() MethodsThe atXXX() MethodsThe plusXXX() and minusXXX() MethodsThe multipliedBy(), dividedBy(), and negated() MethodsInstants and DurationsHuman-Scale TimeThe ZoneOffset ClassThe ZoneId ClassUseful Datetime-Related EnumsLocal Date, Time, and DatetimeOffset Time and DatetimeZoned DatetimeSame Instant, Different TimesClocksPeriodsPeriod Between Two Dates and TimesPartialsAdjusting DatesQuerying Datetime ObjectsNon-ISO Calendar Systems