A cron expression is a compact schedule used by Unix cron, CI systems, and job schedulers. The common 5-field Unix form is minute hour day-of-month month day-of-week.
How to use this explainer
Paste a 5-field Unix cron (for example */5 * * * *).
Read the plain-English description.
Pick a timezone to preview the next N run times.
Export to Quartz, GitHub Actions YAML, or a Kubernetes CronJob.