Java Utililty Methods Day of

SimpleDateFormat fmt = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date param_date = fmt.parse(strDate);
return getOffsetDays(param_date, new Date());

GregorianCalendar rightNow = new GregorianCalendar(Integer.parseInt(day.substring(0, 4)),
        Integer.parseInt(day.substring(4, 6)) - 1, Integer.parseInt(day.substring(6, 8)));
rightNow.add(Calendar.DAY_OF_YEAR, delta);
return getDefaultDateFormat().format(rightNow.getTime());

long deltaDays = 0;
try {
    Date d = sdf.parse(date);
    deltaDays = (d.getTime() - getCurrentTime()) / MILLI_SEC_PER_DAY;
} catch (Throwable t) {
    System.out.println(" [Error] Problem parsing date: " + date + ", Exception: " + t.getMessage());
return deltaDays;
...

Calendar c = Calendar.getInstance();
c.add(Calendar.DAY_OF_MONTH, deltaDays);
return new SimpleDateFormat(YYYYMMDDHHMMSS_FORMAT).format(c.getTime());

String val = null;
if (date != null) {
    Date offsetDate = date;
    if (offsetDays > 0) {
        offsetDate = getDateAfter(date, offsetDays);
    val = DISPLAY_FORMAT.format(offsetDate);
return val;

SimpleDateFormat sdf = new SimpleDateFormat(inPattern);
String __return = "";
try {
    Date d = sdf.parse(date);
    Calendar c = Calendar.getInstance();
    c.setTime(d);
    int start = c.getActualMaximum(Calendar.DAY_OF_MONTH);
    c.set(Calendar.DAY_OF_MONTH, start);
...

SimpleDateFormat df = new SimpleDateFormat(YYYY_MM_DD);
Calendar calendar = Calendar.getInstance();
Date theDate = calendar.getTime();
GregorianCalendar gcLast = (GregorianCalendar) Calendar.getInstance();
gcLast.setTime(theDate);
gcLast.set(Calendar.DAY_OF_MONTH, 1);
String day_first = df.format(gcLast.getTime());
StringBuffer str = new StringBuffer().append(day_first);
...

String formatStr = "yyyy-MM-dd";
if (withTime) {
    formatStr += " HH:mm:ss";
Calendar cal = Calendar.getInstance();
SimpleDateFormat datef = new SimpleDateFormat(formatStr);
cal.set(GregorianCalendar.DAY_OF_MONTH, 1);
Date beginTime = cal.getTime();
...

Calendar c = Calendar.getInstance();
c.setTime(date);
c.set(Calendar.DAY_OF_MONTH, 1);
return c.getTime();

String ntime = "";
int nowMonth;
int nowYear;
try {
    SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
    Date startDate = df.parse(nowDate);
    nowMonth = startDate.getMonth() + 1;
    nowYear = startDate.getYear() + 1900;
...