public static Date convertToGMT(String datetime) {
        DateTimeFormatter formatter = null;
        if(datetime.contains("GMT")){
         formatter = DateTimeFormat.forPattern("E MMM dd yyyy
 HH:mm:ss 'GMT'");
        }else
            if(datetime.contains("UTC")){
         formatter = DateTimeFormat.forPattern("E MMM dd yyyy
HH:mm:ss 'UTC'");
            }
        datetime = datetime.split("-")[0];
         logger.info("gmt time from client side:" + datetime + ":");
         DateTime dt = formatter.parseDateTime(datetime);
         Date gmttime = dt.toDate();
         return gmttime;
     }

Caused by: java.lang.IllegalArgumentException: Invalid format: "Tue Apr 23 06:44:45 UTC" is malformed at ":44:45 UTC"