Read a cron expression, and see when it will fire CRON
A cron line is five terse fields, and one wrong step means a backup that never runs. This reads it back in plain English and shows the actual next run times, so you can trust it.
The expression
┌ minute (0-59) │ ┌ hour (0-23) │ │ ┌ day of month (1-31) │ │ │ ┌ month (1-12 or jan-dec) │ │ │ │ ┌ day of week (0-7, 0 and 7 = Sun) * * * * *
How it works
Reading it, and where it runs
The plain-English line and the real next-run dates are two views of the same thing; the dates catch a mistake the words can hide. The times shown are in the zone you pick here, but the machine running your crontab uses its own zone (often UTC), so confirm which, or a job fires an hour or a day off. CRON only reads and calculates; it schedules and runs nothing.
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