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Never uploadedPaste a cron line and read back, in English, when it actually runs.
Five fields: minute, hour, day of month, month, day of week.
Plain English, with each field broken out separately.
Cron runs in the system timezone of the machine executing it, not yours.
Minute, hour, day of month, month and day of week, in that order. An asterisk means every value; */n means every n.
Confusingly. In standard cron, if both are set to something other than *, the job runs when EITHER matches - not both. That surprises almost everyone, so avoid setting both.
The system timezone of whatever runs it, which is often UTC on a server and local time on your laptop. That difference is the single most common reason a schedule fires at an unexpected hour.
No. The six-field form with seconds is a Quartz and Spring extension, not standard cron. This explains the five-field POSIX form.
Paste a cron expression and read back, in plain English, when it actually runs - with each of the five fields broken out so you can see which one is wrong. Two things catch people out regularly. First, if day-of-month and day-of-week are both set to something other than an asterisk, standard cron runs the job when EITHER matches, not both. Second, a cron runs in the system timezone of the machine executing it, which is usually UTC on a server, and that is the most common reason a job fires at an unexpected hour.
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