Calculate Date/Time based on TimeZone

Hi guys,
what i want to do is the following:
given a database table tzdata composed of time zone names and tz offset
like this :
tzName tzOffset summer time used
Afghanistan ,+4.5, no
Albania ,+1, yes
Algeria, +1, yes
American Samoa,-11, no
i want to be able to display the corresponding Date / Time of each country based on the time zone offset .
I'm using a SimpleDateFormat , and want to know how to calulate time for each entry in table above.
thanks for helping !

given a database table tzdata composed of time zone names and tz offset
i want to be able to display the corresponding Date / Time of each country
based on the time zone offset .
in the offsets i posted above i found things like +10.5 ,-1.2 ect..
how to convert those into the correct format so i can feed it to SimpleTimeZone() construtor ?Why would you want to?
I am just pointing out here that java already has all those timezones and offsets configured into it. As well as if/when DST applies.
String[] zones = TimeZone.getAvailableIDs();
for (int i=0; i<zones.length; i++){
System.out.println("Zone " + i + " = " + zones[i] + " offset = " + TimeZone.getTimeZone(zones).getRawOffset());
In other words this database table is reinventing the wheel.
You just need to tell Java which Timezone you want (according to the standard names for timezones begin Region/City) and it will work out the correct offset.
eg
for Afghanistan: new TimeZone("Asia/Kabul");
Albania: new TimeZone("Europe/Tirane");
Cheers,
evnafets

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given a database table tzdata composed of time zone names and tz offset
i want to be able to display the corresponding Date / Time of each country
based on the time zone offset .
in the offsets i posted above i found things like +10.5 ,-1.2 ect..
how to convert those into the correct format so i can feed it to SimpleTimeZone() construtor ?Why would you want to?
I am just pointing out here that java already has all those timezones and offsets configured into it. As well as if/when DST applies.
String[] zones = TimeZone.getAvailableIDs();
for (int i=0; i<zones.length; i++){
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In other words this database table is reinventing the wheel.
You just need to tell Java which Timezone you want (according to the standard names for timezones begin Region/City) and it will work out the correct offset.
eg
for Afghanistan: new TimeZone("Asia/Kabul");
Albania: new TimeZone("Europe/Tirane");
Cheers,
evnafets

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I have a piece of code that generates timestamps based on US TimeZones such as Pacific, Central and Eastern. I get correct results when I run this code locally (EST) but get results an hour off when I run the same code on a server running in US central time. See the results below and the code that I run.
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ts: 2007-11-05 10:39:03.19 �� (Default time)
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tsCST: 2007-11-05 10:39:01.272� (Central time based on TimeZone String US/Central)
tsPST: 2007-11-05 08:39:01.272� (Pacific time based on TimeZone String America/Los_Angeles)
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Timestamp ts = new Timestamp(Calendar.getInstance().getTime().getTime());
DateFormat df1 = new SimpleDateFormat( "yyyy-MM-dd HH:mm:ss.SS" );
GregorianCalendar cal1 = new GregorianCalendar();
Timestamp tsNow = new Timestamp(cal1.getTimeInMillis());
TimeZone tsEST = TimeZone.getTimeZone("America/New_York");
String inPattern = "yyyy-MM-dd HH:mm:ss.SS";
DateFormat df = new SimpleDateFormat(inPattern);
df.setTimeZone(tsEST);
Date date = df.parse(tsNow.toString());
df.setTimeZone(tsEST);
ts = new Timestamp( df1.parse( df.format(date) ).getTime() );
System.out.println("tsEST: " + ts.toString());
DateFormat df2 = new SimpleDateFormat(inPattern);
TimeZone tsCST = TimeZone.getTimeZone("US/Central");
df2.setTimeZone(tsCST);
ts = new Timestamp( df1.parse( df2.format(date) ).getTime() );
System.out.println("tsCST: " + ts.toString());
TimeZone tsPST = TimeZone.getTimeZone("America/Los_Angeles");
df.setTimeZone(tsPST);
ts = new Timestamp( df1.parse( df.format(date) ).getTime() );
System.out.println("tsPST: " + ts.toString());

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I'm not sure what to do next in this program. Basically, I'm not sure exactly how to get the time to output accurately, as in what forumla I should be using.
This is the question:
What comes 13 hours after 4 o'clock? Create an ElaspedTimeCalculator application that prompts the user for a starting hour, whether it is am or pm, and the number of elapsed hours. The application then displays the time after that many hours have passed. Application output should look similar to:
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Enter am or pm: pm
Enter the number of elapsed hours: 10
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import java.util.Scanner;
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          int elapsed_hours;
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          int time_hours;
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          String am_or_pm;
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>
I am currently integrating Salesforce with ERPLN data via Informatica Cloud ETL.
The client is on ERPLN 6.1, Fp3, and Oracle 10 database and AIX OS. Both the LN Application and Oracle database are on the same Timezone GMT +1.00.
We observed that for Sales/Service Order dates, on Application front and on actual oracle database the date shown are different. There is a difference of either 1 hour or 2 hours, based on the day light savings in Europe.
Because of this difference, there is invariable changes in dates as well. For eg. Service Order date shown on ERPLN Application is 01-Jan-2013 00.12.25, but for the same service order the date stored in oracle database is 31-Dec-2012 23.12.25. Difference of 1 hour results in change of date as well. The difference doesnt remain the same over period, since there is day light savings as well.
So when we pull this data via ODBC connectivity in to Staging Database through Informatica cloud, the date shown is that of Oracle Database. When we push this date in to Salesforce, we want the dates shown same as that of ERPLN application.
Has anyone encountered such problems before, if yes, than what is the resolution for the same? I understand we change the TimeZone of the ODBC user, but that isnt possible or it doesnt help.
>
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Here is a similar thread for your reference:
Timestamp in Sharepoint external content type not matching value in SQL table
Here is a detailed article for your reference:
Why are my date fields wrong in Business Connectivity Services?
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TechNet Community Support

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Take which one you want.WITH dates AS
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Your explanation is correct and what I'm trying to find out is an easy way to override that behaviour.
As an example of what the issue is, let's say an event was entered here, in Toronto,ON, at 3pm, if a customer in Arizona sees the time, he/she will call us immediately to inform us that the event it's supposed to happen at 3pm, and not at 12pm (time that they see with the different timezone).
As far as I've seen, the "best" way to approach this issue is by using the transient tag during data transfer and compensate for the time difference in the client timezone vs the selected "system" timezone using getters/setters, but that implies storing the wrong date/time and locking the system into one timezone, and it's just a hack that may bring undesirable consequences in the future.

Calculate Date/Time based on TimeZone

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