Convert default timezone to UTC

Question

I have calendar object created in system timezone which is of "EDT". When ever i get the cal.getTime(); it prints the date of EDT. How can i get the date of the same calendar in UTC?

I am just trying to convert it to string using the below snippet

   `Calendar cal = Calendar.getInstance();      
    String definedDate = CalendarUtils.toString(cal, "MM/dd/yyyy");
    System.out.println(definedDate); 


public static String toString(Calendar cal, String pattern) {
    String str = "";
    if (cal!= null) {
        SimpleDateFormat dateFormat = new SimpleDateFormat(pattern);
        str = dateFormat.format(cal.getTime());
        LOGGER.error("Date : "+str);
    }
    return str;
}

`

There's a simple direct way to do that, see the linked question. — Tunaki, Aug 09 '16 at 08:05

score 1 · Answer 1 · answered Aug 09 '16 at 08:03

1

Try Below code, set time zone to DateFormat as DateFormat.setTimeZone():

TimeZone timeZone = TimeZone.getTimeZone("UTC");
Calendar calendar = Calendar.getInstance(timeZone);
SimpleDateFormat simpleDateFormat = 
       new SimpleDateFormat("EE MMM dd HH:mm:ss zzz yyyy", Locale.US);
simpleDateFormat.setTimeZone(timeZone);

System.out.println("Time zone: " + timeZone.getID());
System.out.println("default time zone: " + TimeZone.getDefault().getID());
System.out.println();

System.out.println("UTC:     " + simpleDateFormat.format(calendar.getTime()));
System.out.println("Default: " + calendar.getTime());

answered Aug 09 '16 at 08:03

Prabhat Kumar

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2
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Yes it works. Thanks for your input. how can we get the same calendar in UTC instance. here we are converting it to string. – Arun Aug 09 '16 at 08:14
Please mark it as solved, if it works for you. simpleDateFormat.parse("Date in String Format") should work for you. – Prabhat Kumar Aug 09 '16 at 09:20

score 0 · Answer 2 · answered Aug 09 '16 at 07:45

0

Get calendar instance using below snippet...

Calendar cal= Calendar.getInstance(TimeZone.getTimeZone("UTC"));

Or change timezone to utc as following...

cal.setTimeZone(TimeZone.getTimeZone("UTC"));

answered Aug 09 '16 at 07:45

User

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It converts only the timezone. date and time remains the same of system timezone – Arun Aug 09 '16 at 07:55

score 0 · Answer 3 · edited Aug 09 '16 at 09:12

0

Calendar c2 = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
c2.set(year, month, date, hourOfDay, minute, second);
System.out.println(sdf.format(c2.getTime()));

edited Aug 09 '16 at 09:12

Toby Speight

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answered Aug 09 '16 at 07:48

Mosen

1

Although this code may help to solve the problem, providing additional context regarding _why_ and/or _how_ it answers the question would significantly improve its long-term value. Please [edit] your answer to add explanation, including what limitations and assumptions apply. – Toby Speight Aug 09 '16 at 09:11

Convert default timezone to UTC

3 Answers3