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Java Data Type Q&A » Calendar » timezone 

1. Is it possible to create a Calendar object like Tue Mar 03 13:43:00 (without time zone)?    stackoverflow.com

I have a requirement of sending the calendar object with time zone, like Tue Mar 03 13:43:00. I know that Calendar object always return with Tue Mar 03 13:43:00 CST 2009, ...

2. Java: Is this a correct way to get the current time as a Calendar object in a particular time zone?    stackoverflow.com

I know there are other similar questions to this, but I came up with my own way of getting the current time in a specific time zone, so I just wanted ...

3. How to determine if date/time is EDT or EST in Java?    stackoverflow.com

I have a PDF that users must complete. The PDF has date and time fields on it. The PDF instructs the users to input the date and time in Eastern format ...

4. Changing timezone without changing time in Java    stackoverflow.com

I'm receiving a datetime from a SOAP webservice without timzone information. Hence, the Axis deserializer assumes UTC. However, the datetime really is in Sydney time. I've solved the problem by substracting ...

5. Why is 1942/4/3 00:00:00 an illegal date in java.util.Calendar?    stackoverflow.com

Is there something special in the date 3rd of April 1942? For some reason the the hour of day 0 (12:00 am) is illegal for this specific date. The date is ...

6. How do I get a UTC Timestamp from Calendar?    stackoverflow.com

In Java when I use Calendar.getInstance(); I get a Calendar object for the current Timezone. But java.sql.Timestamp is usually stored in UTC Time and not in local time. So how can ...

7. problem on java calendar function    stackoverflow.com

I declared Calendar and SimpleDateFormat like this:

calendar = Calendar.getInstance(TimeZone.getTimeZone("Malaysia"));
final SimpleDateFormat sdf = new SimpleDateFormat("yyyy.MMMMM.dd hh:mm aaa");
or:
calendar = Calendar.getInstance(TimeZone.getTimeZone("GMT+08:00"));
Then I call this:
sdf.format(calendar.getTime());
but result is not in correct time zone (+8 hours). What ...

8. Java Date and Calendar without concept of TimeZone (Regardless of Timezone)    stackoverflow.com

I need to record the time of different systems whose default behavior would convert the input time into the systems' timezone. While what I want is to disable the convert. So ...

9. Why shouldn't I use date4j instead of joda java.util.Calendar or jsr 310?    stackoverflow.com

I recently came across date4j, an extremely simple library (essentially a single class) for working with dates in Java. Conceptually, I really like the "idea" of date4j. ...

10. Java Calendar: getting time for the timezone    stackoverflow.com

The following works (shows UTC time)

TimeZone.setDefault(TimeZone.getTimeZone("UTC"));
System.out.println(new Date());
but this doesn't (shows local time)
    Calendar cal = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
    System.out.println(cal.getTime());
    System.out.println(new Date());
Is there something simple, ...

11. calendar to date and timezone    coderanch.com

TimeZone is not part of the state of Date object. Think of a Date object as just a timestamp -- the number of milliseconds since midnight, 1 Jan 1970 GMT. Unfortunately, Date's toString method formats itself using your JVM default TimeZone. (I'd rather have it's toString method return this raw long value.) Anyway, I think the solution to do your formatting ...

12. Date, Calendar and TimeZones    coderanch.com

Hi I have a method where I am passing in a string and getting a Date object back. Because of DST or TimeZones I am getting odd results. I pass in 30/06/2006 23:30:00 and use SimpleDateFormat to parse it (using TimeZone.getTimeZone("GMT") as the timezone), and the date that I get out is Sat Jul 01 00:30:00 BST 2006. Is there a ...

13. Output a Calendar with timezone, in W3C datetime format?    coderanch.com

I am trying to output a Calendar object (third party application requests a Calendar object in their method) with the date in W3C format For example: 1997-07-16T19:20:30+01:00 I found a posting similar to this on this forum but it wasn't for the Calendar object. Have been stuck on this for over a day and it's driving me nuts!! Anyone got any ...

14. calendar timezone    coderanch.com

Hello, i have a gregorian calendar, i apply a timezone, then i retrieve the date, but it's displayed in GMT timezone , what can i do for retrieving a date from a calendar with a specified timezone . After, i have to use a jcalendar which display the time coresponding to the time zone of the server machine, what could i ...

15. Calendar.HOUR for another timezone    coderanch.com

Hi there, System.out.println(Calendar.getInstance(TimeZone.getTimeZone("EST"))); gives java.util.GregorianCalendar[time=1271917105506,areFieldsSet=true,areAllFieldsSet=true,lenient=true,zone=sun.util.calendar.ZoneInfo[id="EST",offset=-18000000,dstSavings=0,useDaylight=false,transitions=0,lastRule=null],firstDayOfWeek=1,minimalDaysInFirstWeek=1,ERA=1,YEAR=2010,MONTH=3,WEEK_OF_YEAR=17,WEEK_OF_MONTH=4,DAY_OF_MONTH=22,DAY_OF_YEAR=112,DAY_OF_WEEK=5,DAY_OF_WEEK_IN_MONTH=4,AM_PM=0,HOUR=1,HOUR_OF_DAY=1,MINUTE=18,SECOND=25,MILLISECOND=506,ZONE_OFFSET=-18000000,DST_OFFSET=0] Current time is Thu Apr 22 16:18:25 EST 2010 But Calendar.HOUR_OF_DAY return 1 Looks like something to do with OFFSET, GMT... I want to schedule a task when the clock strikes 10AM next. I know i should use add or set of Calendar. But how to get the correct current hours? Any help please?

16. TimeZone, calendar    coderanch.com

Brian Ata wrote:Yes, but the mechanism (calendar object) that creates the date object is fully aware of the timezone it operates and the date is has a constructor that accepts related parameters such as hours, minutes, etc.. It is weird.. You'll need to get rid of faulty thinking like that. It isn't weird at all. Sure, the Calendar knows about time ...

17. Calendar - TimeZone    coderanch.com

I had this weird problem with Calendar time zone today. I have two calendars set to same date ("7/20/2009"). The first one has default timezone (Central Standard Time). The second one I am explicitly setting the time zone to "Central Standard Time". Now when I do a getTimeInMillis() I get different results . The first one returns "1248066000000" and the second ...

18. Confused with Calendars and TimeZones    forums.oracle.com

Following up on a previous response you might also find java.text.SimpleDateFormat useful for parsing your strings into java.util.Date. If I understand what you are doing you only have the time components, so you will have to something about the date part. java.util.Date does not support the concept of 10:00 without some associated date like Sep 10th or Jul 23rd or whatever. ...

19. Calendar Timezone problem    forums.oracle.com

20. Issue with Date, Calendar and TimeZone    forums.oracle.com

Because the Timezone isn't part of the timestamp for a date. This is one thing that Java got right. Think of it this way. There is no such thing as just 9.am. It's 9am in a specific place (timezone) on the Earth. Because at the same time it's 9am in one timezone it's 1pm in another timezone and 11:30 am in ...

21. Calendar, Timestamp, TimeZone and DateFormat    forums.oracle.com

I need to persist date and time with a time zone information into database. In the application, I use the Calendar to represent the data and converse it to java.sql.Timestamp when I need to store the date into DB, use its reversed process to retrieve the data. The following process works for my need in some degree. 1. create a Calendar ...

22. Calendar and time zone    forums.oracle.com

Presumably when the JVM starts up, it calls a system API to find out what the system time zone is, and stores that for future reference. The alternative would be to call that system API to get the time zone every single time it needs to know. Since the time zone isn't something that ever changes, I wouldn't consider that design ...

23. Calendar with different timezone    forums.oracle.com

24. Best way to output a calendar value in a different time zone    forums.oracle.com

All, I've been wondering what's the best way to accomplish this. I have a Calendar object and need to format it to a String. I had been using an instance of SimpleDateFormat and telling it to format the Date object returned from the Calendar.getTime method. The problem is the value in the String needs to be in GMT irrespective of the ...

26. Calendar and TimeZone    forums.oracle.com

28. Calendars, TimeZones and DateFormats... odd creatures!    forums.oracle.com

If MET is "middle europe time" then MEST is middle europe summer time. Summer time was still used on October 26; the change to winter time happened on Sunday October 29. This means that October 29 was 23 hours long instead of the usual 24 hours. If you want to keep the time of the day the same but change only ...

29. Using the Epoch, TimeZones and Calendars    forums.oracle.com

KPSeal, outstanding! Sorry to say I didn't find that, it would have saved me an afternoon, in case anyone else wanders past with the same issue, here is the explanation of the Java behaviour. "During the Second World War, double summer time (2 hours in advance of GMT) was introduced and was used for the period when, normally ordinary summer time ...

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