$ cron
Cron Parser
Explain a cron expression in plain English and see the next five run times. Supports the standard 5-field format.
meaning
Presets:
Ad slot
Cron syntax
Five space-separated fields: minute hour day-of-month month day-of-week. Each accepts * (any), a number, a list 1,3,5, a range 1-5, or a step */15. Day-of-week runs 0–6 with 0 = Sunday (7 also means Sunday on most systems). When both day-of-month and day-of-week are set, standard cron runs when either matches.