Hi, I'm runnig
openjdk version "1.8.0_111" OpenJDK Runtime Environment (build 1.8.0_111-8u111-b14-3-b14) OpenJDK 64-Bit Server VM (build 25.111-b14, mixed mode) and I encounter the following bug. TestCase: @Test public void testNanos() { DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss.nnnnnnX"); Instant instant = Instant.ofEpochSecond(0, 123400); assertEquals(0, instant.getEpochSecond()); assertEquals(123400, instant.getNano()); assertEquals("1970-01-01T00:00:00.123400Z", formatter.format(ZonedDateTime.ofInstant(instant, ZoneId.of("Z")))); assertEquals("1970-01-01T00:00:00.123400Z", instant.toString()); } The test fails on the last assertEquals with: org.junit.ComparisonFailure: expected:<1970-01-01T00:00:00.[]123400Z> but was:<1970-01-01T00:00:00.[000]123400Z> the nanos getting three leading zeros. Arne Plöse