code: public static OffsetDateTime toOffsetDateTime(long timestamp) {
  
  		Calendar calendar = DateTimeUtils.getCalendar(timestamp);
  		return OffsetDateTime.ofInstant(calendar.toInstant(), calendar.getTimeZone().toZoneId());
  	}
docs: Converts timestamp into OffsetDatetime
  
  @param timestamp to be converted
  @return OffsetDatetime representation of timestamp