src/ConvertibleTimestamp.php
public function setTimezone( $timezone ) {
		try {
			$this->timestamp->setTimezone( new DateTimeZone( $timezone ) );
		} catch ( Exception $e ) {
			throw new TimestampException( __METHOD__ . ': Invalid timezone.', $e->getCode(), $e );
		}
	}
public function setTimezone( $timezone ) {
		try {
			$this->timestamp->setTimezone( new DateTimeZone( $timezone ) );
		} catch ( Exception $e ) {
			throw new TimestampException( __METHOD__ . ': Invalid timezone.', $e->getCode(), $e );
		}
	}
Set the timezone of this timestamp to the specified timezone.

@param string $timezone Timezone to set
@throws TimestampException