Kubernetes CronJob Cron Expression Generator
This page covers the cron syntax used by Kubernetes CronJob: field layout, day-of-week numbering, and which special characters it supports.
Quick Reference
Field count
5
Seconds field
No
Year field
No
Timezone
Local / configurable
Special characters (L / #)
No
Requires "?"
No
Day-of-week numbering
Sun=0, Mon=1, Tue=2, Wed=3, Thu=4, Fri=5, Sat=6
Common Kubernetes CronJob Cron Expressions
| Every 5 minutes | */5 * * * * |
| Every 15 minutes | */15 * * * * |
| Every hour | 0 * * * * |
| Daily at midnight | 0 0 * * * |
| Daily at 9:00 AM | 0 9 * * * |
| Every weekday at 9:00 AM | 0 9 * * 1-5 |
| Every Monday at 9:00 AM | 0 9 * * 1 |
| Twice a day (00:00 and 12:00) | 0 */12 * * * |
| First day of every month | 0 0 1 * * |
| Last day of every month | Not natively supported |
Frequently Asked Questions
How is Kubernetes CronJob different from standard Linux cron?
Kubernetes CronJob uses the exact same 5-field syntax and day-of-week numbering as standard Linux cron — existing expressions work unchanged.
Can I convert a Linux cron expression to Kubernetes CronJob automatically?
Yes — paste it into the multi-platform Cron tool above (or on the main Cron Editor page) and switch to the Kubernetes CronJob tab to get the equivalent expression instantly.
Does Kubernetes CronJob support L, W, or # ?
No. Kubernetes CronJob doesn't support L or # — see the workaround pattern in the tool above for equivalent behavior using a day range and an in-script check.
Does Kubernetes CronJob run on my local timezone or UTC?
Kubernetes CronJob evaluates schedules in whatever timezone you configure (or the system/server timezone if none is set) — it isn't fixed to UTC.