When setting an Instant to a TIMESTAMP field in JDBC, do this to prevent the time from drifting by the difference between your system timezone and UTC.

preparedStatement.setTimestamp(
                    place,
                    Timestamp.valueOf(
                        LocalDateTime.ofInstant(
                            param.toJavaInstant(),
                            ZoneId.of(Calendar.getInstance().timeZone.id)
                        )
                    )
                )

No care needs to be taken when retrieving the TIMESTAMP because it comes with a TZ that the Instant accounts for.