Date issue with Georgian Calendar previous day date shown

Question

I had some issue with date: I get the current date (2010-10-27) in NSDate,converting it to NSString ...it's k But again when I try to get the date from String i.e NSDate , I am always getting the day before date . i.e (2010-10-26) instead of getting (2010-10-27).

Plz help me.....I tried alot for the same..with every possibilty

Here is my Code:

  NSDate *now = [NSDate date];
    NSString *date=[NSString stringWithFormat:@"%@",now];
    NSArray *temp=[date componentsSeparatedByString:@" "];
    NSString *currdate=[temp objectAtIndex:0];
    NSDateFormatter *df1 = [[NSDateFormatter alloc] init];
    [df1 setDateFormat:@"yyyy-MM-dd"];
    NSDate *curdate = [df1 dateFromString: currdate];
    [df1 release];

    NSDateFormatter *df=[[NSDateFormatter alloc]init];
    [df setDateFormat:@"yyyy-MM-dd"];
    [df setLocale:[[[NSLocale alloc] initWithLocaleIdentifier:@"en_US_POSIX"] autorelease]]; //Tried to set the Time Zone also
    //[df setLocale:[[[NSLocale alloc] initWithLocaleIdentifier:@"en_EN"] autorelease]];


    if([appDelegate.calGlobalDate isEqualToString:@""]) //My condition
    {appDelegate.calGlobalDate=currdate;}

    NSLog(@"%@",appDelegate.calGlobalDate); //I am getting right date over here
    NSDate *ldate=[df dateFromString:appDelegate.calGlobalDate];
    NSLog(@"%@",[NSString stringWithFormat:@"%@",ldate]); // But for here it always shows me yesterday's date. Here comes the problem
    [df release];

Thanks in advance !!!