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Every 20 Minutes Cron Expression (*/20 * * * *)

The cron expression */20 * * * * — three-times-per-hour maintenance jobs. Field-by-field explanation and next run times, locally in your browser.

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Prefilled local output

Copy the generated result or open the full tool to adjust inputs locally.

Cron expression

*/20 * * * *

Cron explanation

Expression: */20 * * * *

Runs at every 20 minutes; every hour; every day of month; every month; every day of week

Next matching runs:
2026-04-28T00:20:00.000Z
2026-04-28T00:40:00.000Z
2026-04-28T01:00:00.000Z
2026-04-28T01:20:00.000Z
2026-04-28T01:40:00.000Z

Warnings:
- This tool explains common 5-field cron. Quartz seconds/year, time zones, and L/W/# modifiers may behave differently in your scheduler.

Examples

Every 20 Minutes Cron Expression (*/20 * * * *)

The cron expression */20 * * * * — three-times-per-hour maintenance jobs. Field-by-field explanation and next run times, locally in your browser.

*/20 * * * *

How it works

  1. Every 20 Minutes Cron Expression is a practical five-field cron schedule for three-times-per-hour maintenance jobs. The expression `*/20 * * * *` is designed for the common minute, hour, day-of-month, month, and day-of-week format used by many Linux crontab and scheduler interfaces.
  2. Use this preset when you want a known-good starting point that can be copied into a deployment script, CI scheduler, container task, or application job runner. The preview below explains the fields and shows the next matching run times using deterministic local logic.
  3. Because 20 divides evenly into an hour, this schedule stays predictable. Cron dialects are not perfectly portable: Quartz, Kubernetes CronJob, GitHub Actions, systemd timers, and cloud schedulers may interpret seconds, time zones, or special modifiers differently. Always verify the expression in the scheduler that will execute it.

Limitations

  • This preset targets a common workflow and should be reviewed against your production environment.
  • Generated output is deterministic and local-first, but scheduler, log, or infrastructure dialects can vary.
  • Use the full parent tool when you need to adjust fields, ports, options, or sample inputs.

FAQ

Can I copy the Every 20 Minutes Cron Expression cron expression directly?

Yes, for common five-field cron schedulers. Review timezone and dialect behavior before using it in production.

Does this cron preset run on the server?

No. The explanation and next-run preview are generated locally in your browser or at static build time.

Why are Quartz seconds not included?

PureToolkit cron presets intentionally target the common five-field format to keep output predictable.

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