This test polishes CronTriggerTests and modifies the daylightSavingMissingHour() test to help analyze why the test fails for CET if the minute value for the last completion time falls between 0 and 9 minutes. Associated broken build: https://ge.spring.io/s/epphj7vruwcn6/tests/:spring-context:test/org.springframework.scheduling.support.CronTriggerTests/testDaylightSavingMissingHour(LocalDateTime,%20TimeZone)%5B2%5D?expanded-stacktrace=WyIwIl0