DateTimeImmutable
PHP Manual

DateTimeImmutable::setDate

(PHP 5 >= 5.5.0)

DateTimeImmutable::setDateSets the date

说明

public DateTimeImmutable DateTimeImmutable::setDate ( int $year , int $month , int $day )

Like DateTime::setDate() but works with DateTimeImmutable.


DateTimeImmutable
PHP Manual