Epoch & Unix Timestamp in Java

Get the current epoch timestamp

long epochSeconds = java.time.Instant.now().getEpochSecond();

Convert epoch to date

java.time.Instant instant = java.time.Instant.ofEpochSecond(1718200000L);
java.time.ZonedDateTime utc = instant.atZone(java.time.ZoneOffset.UTC);

Convert date to epoch

long epoch = java.time.LocalDateTime.of(2026, 6, 12, 0, 0)
    .toEpochSecond(java.time.ZoneOffset.UTC);