Paste a cron expression and read it in plain English, with its next five runs in whichever zone the job runs in. Standard five-field cron, as used by crontab, Kubernetes CronJobs and most schedulers.
It also warns about the rule that catches everyone: when the day-of-month and day-of-week fields are both set, cron fires when either matches, so the job runs far more often than it looks like it should.