Cron Expression Generator

Use the step operator: */5 * * * *. The */5 in the minute field means "every 5th minute." Similarly, */15 = every 15 minutes, */30 = every 30 minutes.

Set the weekday field to 1-5 (Monday through Friday). Example: 0 9 * * 1-5 runs at 9 AM every weekday. For weekends only, use 0,6 (Sunday and Saturday).

Use a list in the hour field: 0 9,21 * * * runs at 9 AM and 9 PM daily. You can list any hours: 0 8,12,18 * * * runs at 8 AM, noon, and 6 PM.

Standard cron doesn't have a "last day" feature. Some extended implementations support L in the day field. Workaround: use 0 0 28-31 * * with a script that checks if tomorrow is the 1st. Or run on the 28th to be safe.

No — standard cron's minimum interval is 1 minute. Some systems (Spring, Quartz) add a 6th seconds field. For sub-minute scheduling, use a loop inside a minutely cron job, or use a process manager like systemd timers.

Create a CronJob resource with a schedule field. Example: schedule: "*/5 * * * *". K8s uses standard 5-field cron. Since v1.27, you can set timeZone: "America/New_York".

Use on: schedule: - cron: '0 9 * * 1-5' in your workflow YAML. GitHub Actions always uses UTC and has a minimum interval of 5 minutes. Scheduled workflows may be delayed during high load periods.

AWS uses 6-field cron with an added year field and ? for day/weekday. Example: cron(0 9 ? * MON-FRI *). Use EventBridge (CloudWatch Events) rules to trigger Lambda, ECS tasks, or Step Functions.

Run crontab -e to edit your user's crontab. Add a line like 0 9 * * * /path/to/script.sh. Use crontab -l to list current jobs. Tip: redirect output with >> /var/log/myjob.log 2>&1 for debugging.

Warden supports monitoring checks at custom intervals, from every 30 seconds to weekly. You can also schedule maintenance windows so alerts are suppressed during expected downtime — no false alarms during deploys.