Java SimpleDateFormat yyyy-MM-dd T HH mm ss Z gives timezone as IST

Question

I have SimpleDateFormat constructor as   SimpleDateFormat  yyyy-MM-dd T HH mm ss Z      and I am parsing string  2013-09-29T18 46 19Z     I have read that here Z represents the GMT UTC timezone  but when I print this date on console   It prints IST timezne for the returned date   Now my question is whether my output is right or wrong

User · Answer

and if you don t have the option to go on java8 better use   yyyy-MM-dd T HH mm ssXXX  as this gets correctly parsed again  while with only one X this may not be the case    depending on your parsing function   X generates   01  XXX generates   01 00

User · Answer

T  and  Z  are considered here as constants  You need to pass Z without the quotes  Moreover you need to specify the timezone in the input string   Example   2013-09-29T18 46 19-0700 And the format  as  yyyy-MM-dd T HH mm ssZ

User · Answer

From ISO 8601 String to Java Date Object   SimpleDateFormat sdf   new SimpleDateFormat  yyyy-MM-dd T HH mm ss Z     sdf setTimeZone TimeZone getTimeZone  GMT     sdf parse  2013-09-29T18 46 19Z      prints- gt  Mon Sep 30 02 46 19 CST 2013   if you don t set TimeZone getTimeZone  GMT   then it will output Sun Sep 29 18 46 19 CST 2013  From Java Date Object to ISO 8601 String  And to convert Dateobject to ISO 8601 Standard  yyyy-MM-dd T HH mm ss Z   use following code  SimpleDateFormat sdf   new SimpleDateFormat  yyyy-MM-dd T HH mm ss Z    Locale US   sdf setTimeZone TimeZone getTimeZone  GMT                System out println sdf format new Date        -prints- gt  2015-01-22T03 23 26Z   Also note that without     at Z yyyy-MM-dd T HH mm ssZ prints 2015-01-22T03 41 02 0000

User · Answer

tl dr  The other Answers are outmoded as of Java 8   Instant                              Represent a moment in UTC    parse   2013-09-29T18 46 19Z        Parse text in standard ISO 8601 format where the  Z  means UTC  pronounces    Zulu      atZone                              Adjust from UTC to a time zone       ZoneId of   Asia Kolkata                                         Returns a  ZonedDateTime  object     ISO 8601  Your string format happens to comply with the ISO 8601 standard  This standard defines sensible formats for representing various date-time values as text   java time  The old java util Date  Calendar and java text SimpleDateFormat classes have been supplanted by the java time framework built into Java 8 and later  See Tutorial  Avoid the old classes as they have proven to be poorly designed  confusing  and troublesome    Part of the poor design in the old classes has bitten you  where the toString method applies the JVM s current default time zone when generating a text representation of the date-time value that is actually in UTC  GMT   well-intentioned but confusing   The java time classes use ISO 8601 formats by default when parsing generating textual representations of date-time values  So no need to specify a parsing pattern   An Instant is a moment on the timeline in UTC   Instant instant   Instant parse   2013-09-29T18 46 19Z       You can apply a time zone as needed to produce a ZonedDateTime object   ZoneId zoneId   ZoneId of   America Montreal     ZonedDateTime zdt   instant atZone  zoneId

User · Answer

IF you want to handle  standard  JSON representation of the Date then better to use this pattern   yyyy-MM-dd T HH mm ssX    Notice the X on the end   It will handle timezones in ISO 8601 standard  and ISO 8601 is exactly what produces this statement in Javascript new Date   toJSON     Comparing to other answers it has some benefits     You don t need to require your clients to send date in GMT You don t need to explicitly convert your Date object to GMT using this  sdf setTimeZone TimeZone getTimeZone  GMT

User · Answer

You haven t set the timezone only added a Z to the end of the date time  so it will look like a GMT date time but this doesn t change the value   Set the timezone to GMT and it will be correct   SimpleDateFormat sdf   new SimpleDateFormat  yyyy-MM-dd T HH mm ss Z     sdf setTimeZone TimeZone getTimeZone  GMT

User · Answer

For Java 8  You can use inbuilt java time format DateTimeFormatter to reduce any chance of typos   like   DateTimeFormatter formatter   DateTimeFormatter ISO ZONED DATE TIME    ISO ZONED DATE TIME represents 2011-12-03T10 15 30 01 00 Europe Paris  is one of the bundled standard DateTime formats provided by Oracle link

[java] Java SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'") gives timezone as IST

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