eventespresso / event-espresso-core

	 * @param string $timezone

	 * @return EEM_Event

	 */

	public static function instance( $timezone = NULL ){

		// check if instance of EEM_Event already exists

		if ( ! self::$_instance instanceof EEM_Event ) {

			// instantiate Espresso_model

			self::$_instance = new self( $timezone );

		}

		//we might have a timezone set, let set_timezone decide what to do with it

		self::$_instance->set_timezone( $timezone );

		// EEM_Event object

		return self::$_instance;

	}

	/**

	 *		@param string $timezone string representing the timezone we want to set for returned Date Time Strings (and any incoming timezone data that gets saved).  Note this just sends the timezone info to the date time model field objects.  Default is NULL (and will be assumed using the set timezone in the 'timezone_string' wp option)

	 *		@return static (as in the concrete child class)

	 */

	public static function instance( $timezone = NULL ){

		// check if instance of Espresso_model already exists

		if ( ! static::$_instance instanceof static) {

			// instantiate Espresso_model

			static::$_instance = new static( $timezone );

		}

		//we might have a timezone set, let set_timezone decide what to do with it

		static::$_instance->set_timezone( $timezone );

		// Espresso_model object

		return static::$_instance;

	}