Initial calculation of the first expiration time for a scheduled timer is wrong if a start date is set ------------------------------------------------------------------------------------------------------ Key: WFLY-5995 URL: https://issues.jboss.org/browse/WFLY-5995 Project: WildFly Issue Type: Bug Components: EJB Affects Versions: 8.2.1.Final, 9.0.2.Final, 10.0.0.CR5 Reporter: Wolf-Dieter Fink Assignee: Wolf-Dieter Fink Labels: timers, timerservice Fix For: 10.0.0.Final If a scheduled timer should be created with the following parameters: ScheduleExpression[second=0 minute=0/5 hour=20-22 dayOfWeek=* dayOfMonth=* month=* year=* start=Thu Jan 14 09:45:35 GMT+1 2016] The first schedule should be Thu Jan 17 20:00:20 GMT+1 2016 but is calculated as Sun Jan 17 20:45:35 GMT+1 2016 The minutes are not correctly set according to the schedule and the given start date. This happen for seconds/minutes if the ScheduleExpression limit the range.