Free tools, Developers
Cron expression helper
Type or build a cron schedule. You get it in plain English and the next ten times it will run.
Next runs
Questions
What do the five fields mean?
In order: minute (0–59), hour (0–23), day of the month (1–31), month (1–12) and day of the week (0–6, where 0 is Sunday). * means every value, */15 means every 15th, 1-5 is a range and 1,15 is a list.
Which time zone does cron use?
The time zone of the server running it, which is often UTC. Check with the date command on the server. The next runs below can be shown in your local time or in UTC.
Why does my job run twice or never on some days?
When both day of the month and day of the week are set (not *), classic cron runs the job when either one matches, not both. Daylight saving changes can also skip or repeat jobs scheduled between 1:00 and 3:00.
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