C4::Context->preference('DefaultHoldExpirationdateUnitOfTime') || 'days';
$self->expirationdate(
dt_from_string( $self->reservedate )->add( $timeunit => $period ) );
dt_from_string( $self->reservedate )->add( $timeunit => $period )->strftime("%Y-%m-%d") );
}
=head3 _move_to_old
-