Java Utililty Methods Date Format ISO

return new SimpleDateFormat(FORMAT_ISO).format(Now());

final TimeZone tz = TimeZone.getTimeZone("UTC");
final DateFormat df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX");
df.setTimeZone(tz);
return df.format(new Date());

if (dateStr == null)
    return null;
String val = dateStr;
try {
    if (dateStr.indexOf('T') == 10 && dateStr.endsWith("Z")) {
        Date date = CREATION_DATE_FORMAT.parse(dateStr);
        val = GUNVOR_TOOLS_DATE_FORMAT.format(date);
    } else if (dateStr.indexOf('T') == 10) {
...

final DateFormat df = new SimpleDateFormat(dateFormat);
df.setTimeZone(TimeZone.getDefault());
Date date;
try {
    date = df.parse(isoDateString);
} catch (final ParseException ex) {
    return null;
return date;

if (time == 0)
    return null;
Date date = new Date(time);
String formatString = "yyyy-MM-dd'T'HH:mm:ssZ"; 
if (!includeTime)
    formatString = "yyyy-MM-dd"; 
return new SimpleDateFormat(formatString).format(date);

synchronized (basicISO8601DateTimeFormatter) {
    return basicISO8601DateTimeFormatter.format(value);

String val = "";
try {
    val = sdfDateIso.get().format(date);
} catch (Exception e) {
    val = sdfDateIso.get().format(new Date(0));
return val;

SimpleDateFormat dateFormat = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss z", Locale.US);
dateFormat.setTimeZone(TimeZone.getTimeZone("GMT"));
return dateFormat.format(date);

if (calendar == null) {
    return null;
return javax.xml.bind.DatatypeConverter.printDateTime(calendar);

if (date == null)
    return null;
DateFormat fmt = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.sss'Z'", Locale.US);
fmt.setTimeZone(TimeZone.getTimeZone("UTC"));
return fmt.format(date);