Cron Explainer

Paste a cron expression to see what it means in plain English and when it runs next.

[local] Runs in your browser. Nothing you enter leaves your device.

Cron Explainer

Or edit each field:

Next runs
    Time zone

    How it works

    cron is the Linux scheduler. Each line of a crontab (crontab -e) is a schedule followed by a command. The schedule has five fields: 

    ┌──────── minute        (0–59)
│ ┌────── hour          (0–23)
│ │ ┌──── day of month  (1–31)
│ │ │ ┌── month         (1–12 or JAN–DEC)
│ │ │ │ ┌ day of week   (0–7 or SUN–SAT, 0 and 7 = Sunday)
* * * * *  command to run
    • * means every value, 5 one value, 1-5 a range.
    • 1,15 is a list, */15 means every 15th value.
    • Shortcuts: @hourly, @daily, @weekly, @monthly, @yearly, and @reboot (once at startup).

    The classic gotcha: if you set both day of month and day of week, cron runs when either matches. 0 0 13 * FRI runs on every 13th and every Friday, not just Friday the 13th.

    Next run times are shown in your browser's time zone. Servers often run in UTC, so check with timedatectl on the machine itself.