src/DatePeriod.php
public function setEndTimezone($timezone = 'UTC')
	{
		$this->end->setTimezone(is_string($timezone) ? new \DateTimeZone($timezone) : $timezone);
		return $this;
	}
public function setEndTimezone($timezone = 'UTC')
	{
		$this->end->setTimezone(is_string($timezone) ? new \DateTimeZone($timezone) : $timezone);
		return $this;
	}
public function setEndTimezone ( $ timezone = 'UTC' ) { $ this -> end -> setTimezone ( is_string ( $ timezone ) ? new \ DateTimeZone ( $ timezone ) : $ timezone ) ; return $ this ; }
Sets the end date timezone

@link	http://php.net/manual/en/datetime.settimezone.php

@param  string|DateTimeZone $timezone
@return $this
Sets the end date timezone