@CliCommand(value = "admin config timezone list", help = "List all timezones")
	public String listTimeZones() {
		final StringBuilder timeZones = new StringBuilder();

		for (String timeZone : TimeZone.getAvailableIDs()) {
			timeZones.append(timeZone + "\n");
		}

		return timeZones.toString();
	}
Retrieve a list of available {@link TimeZone} Ids via a Spring XD Shell command.
spring-xd-shell/src/main/java/org/springframework/xd/shell/command/ConfigCommands.java