Cron Expression Parser
Validate a five-field cron expression and calculate its next scheduled run times.
Result
| # | UTC time | Unix time |
|---|---|---|
| 1 | 2026-01-05T09:00:00.000Z | 1767603600 |
| 2 | 2026-01-05T09:15:00.000Z | 1767604500 |
| 3 | 2026-01-05T09:30:00.000Z | 1767605400 |
| 4 | 2026-01-05T09:45:00.000Z | 1767606300 |
| 5 | 2026-01-05T10:00:00.000Z | 1767607200 |
About Cron Expression Parser
Inspect a standard minute-hour-day-month-weekday cron schedule and preview upcoming UTC runs before installing it in automation. Named shortcuts for common hourly, daily, weekly, monthly and yearly schedules are supported.
Cron field order
The five fields are minute, hour, day of month, month and day of week. Lists, ranges, wildcards and step values are expanded and validated before the schedule is searched.
Production scheduling
A syntactically valid expression is only part of a safe job. Confirm the host timezone, daylight-saving behaviour, job duration, overlap policy and retry handling. Redirect output to monitored logs and make the command idempotent where possible. For backups and maintenance, test restoration or rollback rather than assuming a successful exit means the objective was achieved. Platform extensions such as seconds, names or special characters are intentionally not inferred here.
Common use cases
- Verify a backup schedule before deployment.
- Convert an expression into concrete UTC times.
- Troubleshoot ranges, lists and step syntax.
Edge cases and gotchas
- A preview does not guarantee execution. Verify the service account, environment, working directory, path, locking, timeout and notification behaviour on the real scheduler, then monitor the first production runs and confirm the expected operational result.