CRON
Cron Expression Generator
Build a cron expression field by field, with a plain-English explanation and a preview of the next run times.
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This tool runs entirely in your browser. The standard five-field cron format (Linux/Vixie cron) is supported; JAN-DEC and SUN-SAT names also work in the month and day-of-week fields. If you set both "day of month" and "day of week", cron convention runs the job when either one matches, not only when both do.