DateTimeImmutable::setTimezone
DateTimeInterface
DateTimeImmutable
PHP Manual

# DateTimeImmutable::sub

(PHP 5 >= 5.5.0, PHP 7)

DateTimeImmutable::sub — Subtracts an amount of days, months, years, hours, minutes and seconds

### Description

public DateTimeImmutable DateTimeImmutable::sub ( DateInterval `$interval` )

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

DateTimeImmutable::setTimezone
DateTimeInterface
DateTimeImmutable
PHP Manual