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A 5-field cron expression in, one plain-English sentence and the next five run times out. Lists, ranges, steps and JAN/MON names all parse; 0 and 7 both mean Sunday; and when day-of-month and day-of-week are both set it tells you cron runs on either — the classic misreading. Quartz-only syntax gets a straight refusal naming what it can’t do.
0 9 * * MON-FRI
At 09:00 on Monday through Friday.
Standard five-field cron as cron(8) defines it — lists, ranges, steps and names, with 0 and 7 both meaning Sunday. Quartz extras (L, W, #, ?), seconds fields and @shortcuts are refused by name rather than half-read. Run times are worked out in your browser’s time zone, which is only right if it matches the machine the crontab lives on — and around a DST change real cron does its own special dance this preview doesn’t model.
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