Learn How Cron Expressions Work
Each tweak shows immediate plain-English explanation and a preview of the next 5 runs — best way to learn cron.
(0-59)hour
(0-23)day
(1-31)month
(1-12)weekday
(0-6)
In plain English
At 09:00 on Mon, Tue, Wed, Thu, Fri.
- Thu, May 2809:00
- Fri, May 2909:00
- Mon, Jun 109:00
- Tue, Jun 209:00
- Wed, Jun 309:00
Common patterns
Compatible with standard Unix cron, GitHub Actions, Kubernetes CronJob, and most scheduling systems. Use * for “every”, */5 for “every 5”, 1-5 for ranges, 1,15 for specific values.
Learning tips
Click through the preset patterns to see how each field maps to time. Start simple, work up to compound expressions.
The "next 5 runs" preview is the best learning tool — instant feedback when your expression doesn't mean what you thought.
Cron syntax: minute (0-59), hour (0-23), day-of-month (1-31), month (1-12), day-of-week (0-6, 0=Sunday).
Cómo funciona
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