ejb3/src/main/java/org/jboss/as/ejb3/timerservice/persistence/database/DatabaseTimerPersistence.java
private Date stringAsSchedulerDate(final String date, final String timerId) {
        if (date == null) {
            return null;
        }
        try {
            return new SimpleDateFormat(SCHEDULER_DATE_FORMAT).parse(date);
        } catch (ParseException e) {
            EjbLogger.EJB3_TIMER_LOGGER.scheduleExpressionDateFromTimerPersistenceInvalid(timerId, e.getMessage());
            return null;
        }
    }
private Date stringAsSchedulerDate(final String date, final String timerId) {
        if (date == null) {
            return null;
        }
        try {
            return new SimpleDateFormat(SCHEDULER_DATE_FORMAT).parse(date);
        } catch (ParseException e) {
            EjbLogger.EJB3_TIMER_LOGGER.scheduleExpressionDateFromTimerPersistenceInvalid(timerId, e.getMessage());
            return null;
        }
    }
Convert the stored date-string from database back to Date