src/main/java/com/zandero/utils/DateTimeUtils.java
public static OffsetDateTime toOffsetDateTime(long timestamp) {

		Calendar calendar = DateTimeUtils.getCalendar(timestamp);
		return OffsetDateTime.ofInstant(calendar.toInstant(), calendar.getTimeZone().toZoneId());
	}
public static OffsetDateTime toOffsetDateTime(long timestamp) {

		Calendar calendar = DateTimeUtils.getCalendar(timestamp);
		return OffsetDateTime.ofInstant(calendar.toInstant(), calendar.getTimeZone().toZoneId());
	}
Converts timestamp into OffsetDatetime

@param timestamp to be converted
@return OffsetDatetime representation of timestamp