Java Programming

I have a PreparedStatement that sometimes sets the date a day behind. I am saving to a MSSQL DB with a field datetime. I have two identical PreparedStatments, one for insert and one for update. When either is executed, it will sometimes set the date back one day. It's not everytime. Every other or every third one, but it's not consistent. Any help would be appreciated.

ps.setDate(1, Util.parseSqlDate(getParam("CHARGED")));

public class Util {
	public static java.sql.Date parseSqlDate(String datestr) {
		DateFormat sdf = null;
		if (datestr == null)
			return null;
		if (datestr.length() > 8) {
			sdf = new SimpleDateFormat("MM/dd/yyyy");
		}
		else {
			sdf = new SimpleDateFormat("MM/dd/yy");
		}
		java.util.Date d = null;
		try {
		 d = sdf.parse(datestr);
		} catch (ParseException e) {
			return null;
		}
		
		if (d != null) {
			Calendar cal = Calendar.getInstance();
			cal.setTime(d);
			return new java.sql.Date(cal.getTimeInMillis());
		}
		return null;
	}
}

	
        protected String getParam(String name) {
		return (getParamArray(name)== null) ? null : getParamArray(name)[0];
	}
	protected String[] getParamArray(String name) {
		return (String[])params.get(name);
	}