Comment by javanonymous

The Java library actually supports this case.

It may not have the convenient "years" method directly, but you can add an arbitrary unit of time quite easily

Example with duration:

    Duration.of(1, ChronoUnit.YEARS)

Example with datetime:

    today.plus(2, ChronoUnit.YEARS)

It even supports decades, centuries, eras and half days :-)

For those curious about how it handles leap years:

    var leapDay = LocalDate.of(2024, 2, 29)
    leapDay.plus(1, ChronoUnit.YEARS);
   
    // ==> 2025-02-28

    var lastYear = LocalDate.of(2023, 3, 1);
    lastYear.plus(1, ChronoUnit.YEARS);

    // ==> 2024-03-01

    var lastFeb = LocalDate.of(2023, 2, 28);
    lastFeb.plus(1, ChronoUnit.YEARS);

    // ==> 2024-02-28

    var firstFeb = LocalDate.of(2024, 2, 1);
    leapDay.with(TemporalAdjusters.lastDayOfMonth());

    // ==> 2024-02-29