Here you can find the source of UTCTimeZone()
public static TimeZone UTCTimeZone()
//package com.java2s; //License from project: Apache License import java.util.TimeZone; public class Main { public final static String UTC_TIMEZONE_IDENTIFIER = "UTC"; /**//ww w . j ava2 s. c o m * Returns the UTC time zone. * * @return The UTC time zone. Defaults to the closely-related GMT time zone, * if for some reason the UTC time zone identifier cannot be understood. */ public static TimeZone UTCTimeZone() { return TimeZone.getTimeZone(UTC_TIMEZONE_IDENTIFIER); } }