Debug standard 5-field cron expressions with safe presets, a deterministic share URL, field-by-field explanations, and an upcoming-run timeline.
Previewed this 5-field cron schedule in Asia/Seoul and expanded the next 5 matching runs for quick debugging.
*/5
*
*
*
*
Stay on this page for the schedule preview itself, then jump into the matching guide or the related regex, Markdown, and diff explainers when the task expands.
A cron expression is a string of five fields that defines a repeating schedule: minute, hour, day of month, month, and day of week. Some schedulers add optional seconds or year fields.
Standard cron has 5 fields: minute (0-59), hour (0-23), day of month (1-31), month (1-12), day of week (0-6, Sunday=0). Special characters include: * (any), , (list), - (range), / (step). Extended formats may include seconds and year fields.
0 0 * * *
Every day at midnight
*/15 * * * *
Every 15 minutes
0 9 * * 1-5
Every weekday at 9 AM
0 0 1 * *
First day of every month at midnight
Traditional cron uses the system timezone. Modern schedulers like Kubernetes CronJobs let you specify the timezone. Always verify which timezone your cron system uses.
Standard 5-field cron doesn't support seconds (minimum is every minute). Some systems like Quartz support 6-field cron with seconds. Alternatives include using sleep loops or task schedulers designed for sub-minute intervals.