![]() * For any reason, if you have to stick to Java 6 or Java 7, you can use ThreeTen-Backport which backports most of the java.time functionality to Java 6 & 7. Learn more about the modern Date-Time API * from Trail: Date Time.Ĭheck this answer and this answer to learn how to use java.time API with JDBC. Note: For any reason, if you need to convert an object of OffsetDateTime or ZonedDateTime to an object of, you can do so as follows: Date date = om(odtNow.toInstant()) OffsetDateTime odtNow = OffsetDateTime.now(zoneOffset) OffsetDateTime odt = OffsetDateTime.of(LocalDate.of(2020, Month.OCTOBER, 22), LocalTime.MIN, zoneOffset) ZoneOffset zoneOffset = ZoneOffset.of("-04:00") Use OffsetDateTime for a fixed timezone offset. ![]() Then, what Date-Time object should I use for a fixed timezone offset? The Java platform can then only recognize one of them. "Central Standard Time" and "China Standard Time"), and However, their use is deprecated because the sameĪbbreviation is often used for multiple time zones (for example, "CST"Ĭould be U.S. Other three-letter time zone IDs (such as "PST", "CTT", "AST") areĪlso supported. The following quote from the documentation states the problem clearly: Three-letter time zone IDs ONLINE DEMO Avoid using the abbreviated timezone names ZonedDateTime zdtNow = ZonedDateTime.now(zoneId) ZonedDateTime zdtDstOff = ZonedDateTime.of(LocalDate.of(2020, Month.NOVEMBER, 22), LocalTime.MIN, zoneId) ZonedDateTime zdtDstOn = ZonedDateTime.of(LocalDate.of(2020, Month.OCTOBER, 22), LocalTime.MIN, zoneId) ZoneId zoneId = ZoneId.of("America/New_York") Use ZonedDateTime which has been designed to adjust the timezone offset automatically. What Date-Time object should I use to adjust the offset automatically? Note that from Java SE 8 onwards, users are asked to migrate to java.time (JSR-310) - a core part of the JDK which replaces this project. It is recommended to stop using them completely and switch to the modern Date-Time API *.Īlso, quoted below is a notice from the home page of Joda-Time: The java.util Date-Time API and their formatting API, SimpleDateFormat are outdated and error-prone. EDT (summer time): has a timezone offset of -04:00 hours.EST (winter time): has a timezone offset of -05:00 hours.The timezone, America/New_York observes two different timezone offsets: That's a different matter though, really.) (Personally I'd also advise you to stay away from Date and Calendar, preferring to use Joda Time wherever possible. "Central Standard Time" and "China Standard Time"), and the Java platform can then only recognize one of them. However, their use is deprecated because the same abbreviation is often used for multiple time zones (for example, "CST" could be U.S. From the documentation:įor compatibility with JDK 1.1.x, some other three-letter time zone IDs (such as "PST", "CTT", "AST") are also supported. In general, stay away from the abbreviations. So if you want to know the actual local time for New York at any particular instant, use America/New_York. it tells you some information, but not quite enough.) It's a bit like calling an encoding "extended ASCII". (I don't generally like even "Eastern Time" and the like, as different places which observe "Eastern Time" may vary in their DST transitions. ![]() When writing about a time zone which is just a fixed offset and not related to a particular place, I'd prefer to use "Etc/GMT+5" or something similarly obviously-fixed. It's not really a proper time zone in its own right, IMO - it's the "standard" part of a fuller time zone. It's always in standard time - it doesn't have the daylight saving part. EST is half of the New York time zone, effectively. ![]()
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