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cron.surf

Convert Kubernetes cron to crontab

Kubernetes writes min hour dom mon dow; crontab writes min hour dom mon dow. Paste an expression to convert it. Anything that does not map exactly is flagged with the reason and a workaround.

“At 09:00, Monday through Friday”

To · crontabExact
0 9 * * 1-5
Runs in the system time zone; cronie also reads CRON_TZ=.

Same schedule on other platforms

GitHub ActionsExact
0 9 * * 1-5
Runs in UTC unless the entry sets timezone:.
AWS EventBridgeExact
cron(0 9 ? * 2-6 *)
cron() with six fields; one day field must be ?. UTC unless you set a time zone.
SpringExact
0 0 9 * * 1-5
Six fields, seconds first; set zone= or it uses the server zone.
QuartzExact
0 0 9 ? * 2-6
Seconds first, Sunday is 1, one day field must be ?.

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Kubernetes vs crontab

Kubernetescrontab
Fieldsmin hour dom mon dowmin hour dom mon dow
Sunday0 (7 is an error)0 or 7
Day and weekday both seteither matches; only * or ? leaves a field openeither matches; both must if one starts with *
Special charactersnonenone
Shortcuts@yearly @monthly @weekly @daily @hourly@reboot @yearly @monthly @weekly @daily @hourly
Time zonespec.timeZone, else the controller’s zonesystem zone; CRON_TZ= in cronie
Shortest interval1 minute1 minute

Common schedules, converted

Kubernetescrontab
Every 5 minutes*/5 * * * **/5 * * * *
Every hour0 * * * *0 * * * *
Every minute* * * * ** * * * *
Every 10 minutes*/10 * * * **/10 * * * *
Every 15 minutes*/15 * * * **/15 * * * *
Every 30 minutes*/30 * * * **/30 * * * *
Daily at midnight0 0 * * *0 0 * * *
Daily at 9 am0 9 * * *0 9 * * *
Weekdays at 9 am0 9 * * 1-50 9 * * 1-5
Every Monday0 0 * * 10 0 * * 1
First day of the month0 0 1 * *0 0 1 * *
Every 6 hours0 */6 * * *0 */6 * * *
Every Sunday at midnight0 0 * * 00 0 * * 0
Every 2 hours0 */2 * * *0 */2 * * *
Every 12 hours0 */12 * * *0 */12 * * *
Daily at noon0 12 * * *0 12 * * *
Every Friday0 0 * * 50 0 * * 5
Every quarter0 0 1 */3 *0 0 1 */3 *
Every 2 minutes*/2 * * * **/2 * * * *
Every 3 hours0 */3 * * *0 */3 * * *
Daily at 6 am0 6 * * *0 6 * * *
Daily at 6 pm0 18 * * *0 18 * * *
Twice a day0 */12 * * *0 */12 * * *
Weekdays at 6 pm0 18 * * 1-50 18 * * 1-5
Weekends at 10 am0 10 * * 0,60 10 * * 0,6
15th of the month0 0 15 * *0 0 15 * *
Once a year0 0 1 1 *0 0 1 1 *
Every 3 minutes*/3 * * * **/3 * * * *
Every 20 minutes*/20 * * * **/20 * * * *
Every 4 hours0 */4 * * *0 */4 * * *
Every 8 hours0 */8 * * *0 */8 * * *
Daily at 1 am0 1 * * *0 1 * * *
Daily at 2 am0 2 * * *0 2 * * *
Daily at 3 am0 3 * * *0 3 * * *
Daily at 8 am0 8 * * *0 8 * * *
Every weekday0 0 * * 1-50 0 * * 1-5
Every weekend day0 0 * * 0,60 0 * * 0,6
Every Tuesday0 0 * * 20 0 * * 2
Every Wednesday0 0 * * 30 0 * * 3
Every Thursday0 0 * * 40 0 * * 4
Every Saturday0 0 * * 60 0 * * 6
Every 6 months0 0 1 */6 *0 0 1 */6 *

FAQ

Can every Kubernetes expression be converted to crontab?

Of the 42 common schedules on this page, all convert exactly. Special characters that crontab lacks are still flagged when you use them.

How is Sunday written in Kubernetes and crontab?

Kubernetes: 0 (7 is an error). crontab: 0 or 7.

Does the time zone carry over?

The expression has no time zone. Kubernetes: spec.timeZone, else the controller’s zone. crontab: system zone; CRON_TZ= in cronie.